sync wl-2_4

[elisp/wanderlust.git] / doc / wl.texi

\input texinfo @c -*-texinfo -*-
@c %**start of header
@setfilename wl.info
@settitle Wanderlust -- Yet Another Message Interface On Emacsen --
@c %**end of header
@documentlanguage en
@documentencoding us-ascii
@set VERSION 2.5.2
@synindex pg cp
@finalout

@dircategory GNU Emacs Lisp
@direntry
* Wanderlust: (wl).         Yet Another Message Interface On Emacsen
@end direntry

@c permissions text appears in an Info file before the first node.
@ifinfo
This file documents Wanderlust, Yet another message interface on
Emacsen.

Copyright @copyright{} 1998, 1999, 2000 @w{Yuuichi Teranishi},
@w{Fujikazu Okunishi}, @w{Masahiro Murata}, @w{Kenichi Okada},
@w{Kaoru Takahashi}, @w{Bun Mizuhara} and @w{Masayuki Osada}.

This edition is for Wanderlust version @value{VERSION}.

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

@ignore
Permission is granted to process this file through TeX and print the
results, provided the printed document carries copying permission notice
identical to this one except for the removal of this paragraph (this
paragraph not being relevant to the printed manual).

@end ignore
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

Permission is granted to copy and distribute translations of this manual
into another language, under the above conditions for modified versions.

@end ifinfo

@titlepage
@sp 10
@title Wanderlust User's Manual
@subtitle Yet another message interface on Emacsen
@subtitle for Wanderlust version @value{VERSION}
@author Yuuichi Teranishi
@author Fujikazu Okunishi
@author Masahiro Murata
@author Kenichi Okada
@author Kaoru Takahashi
@author Bun Mizuhara
@author Masayuki Osada
@page

@vskip 0pt plus 1filll
Copyright @copyright{} 1998, 1999, 2000 @w{Yuuichi Teranishi},
@w{Fujikazu Okunishi}, @w{Masahiro Murata}, @w{Kenichi Okada},
@w{Kaoru Takahashi}, @w{Bun Mizuhara} and @w{Masayuki Osada}.

This manual is for Wanderlust version @value{VERSION}.

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

Permission is granted to copy and distribute translations of this manual
into another language, under the above conditions for modified versions.

@end titlepage


@ifinfo
@node Top, Introduction, (dir), (dir)
@top Wanderlust User's Manual

@flushright
Yuuichi Teranishi
Fujikazu Okunishi
Masahiro Murata
Kenichi Okada
Kaoru Takahashi
Bun Mizuhara
Masayuki Osada
@end flushright

This manual is for Wanderlust @value{VERSION}.

@end ifinfo

@menu
* Introduction::             Read this first.
* Start Me Up::              Invoking Wanderlust.
* Folders::                  How to specify folders.
* Folder::                   Selecting and editing folders.
* Summary::                  Reading and refiling messages.
* Message::                  Saving and playing MIME multipart entities.
* Draft::                    Draft buffer, sending mail and news.
* Disconnected Operations::  Off-Line management
* Expire and Archive::       Automatic expiration and archiving of messages.
* Scoring::                  Score of the messages.
* Customization::            Customizing Wanderlust.
* Mailing List::             Wanderlust mailing list
* Addition::                 Additional Information
* Index::                    Key index.
@end menu


@node Introduction, Start Me Up, Top, Top
@chapter Introduction of Wanderlust
@cindex Introduction

Wanderlust is an mail/news management system on Emacsen.
It supports IMAP4rev1(RFC2060), NNTP, POP and local message files.

The main features of Wanderlust:

@itemize @minus
@item Pure elisp implementation.
@item Supports IMAP4rev1, NNTP, POP(POP3/APOP), MH and Maildir format.
@item Unified access method to messages based on Mew-like Folder Specification.
@item Mew-like Key-bind and mark handling.
@item Manages unread messages.
@item Interactive thread display.
@item Folder Mode shows the list of subscribed folders.
@item Message Cache, Disconnected Operation (Read Only).
@item MH-like FCC. (FCC: %Backup and FCC: $Backup is allowed).
@item MIME compliant (by SEMI or tm).
@item Transmission of news and mail are unified by Message transmitting draft.
@item Graphical list of folders (XEmacs and Emacs 21).
@item View a part of message without retrieving the whole message (IMAP4).
@item Server-side message look up (IMAP4). Multi-byte characters are allowed.
@item Virtual Folders.
@item Supports compressed folder using common archiving utilities.
@item Old articles in folders are automatically removed/archived (Expiration).
@item Automatic re-file.
@item Template function makes it convenient to send fixed form messages.
@end itemize


@section Environment

Wanderlust is supposed to run on following Emacsen: 
@c Wanderlust runs even on Nemacs 3.3.2 based on Emacs 18.55, 18.59 (with
@c limited functionality).

@itemize @bullet
@item Nemacs 3.3.2 (Caution: limited functionality)
@item Mule 2.3 based on Emacs 19.28
@item Mule 2.3 based on Emacs 19.34
@item Emacs 20.2 or later
@item XEmacs 20.4 or later
@item Meadow 1.00 or later
@item Mule for Windows v1.22
@item NTEmacs 20.4 or later
@item PMMule
@end itemize

IMAP4 connectivity with following imapd are confirmed to work with
Wanderlust:

@itemize @bullet
@item UW imapd 4.1--4.7, 4.7a, 4.7b, 4.7c, 2000 or later
@item Cyrus imapd 1.4, 1.5.19, 1.6.22, 2.0.5 or later
@item AIR MAIL (AIRC imapd release 2.00)
@item Express Mail
@item Microsoft Exchange Server 5.5
@item Sun Internet Mail Server 4.0
@end itemize

@c LDAP connectivity with following LDAPd are confirmed to work with
@c Wanderlust:


@node Start Me Up, Folders, Introduction, Top
@chapter Start up Wanderlust
@cindex Start up

The necessary procedure for starting Wanderlust is explained in steps
here.

(Of course, you need a mail/news readable environment in advance)

@menu
* MIME Modules::      Installing the MIME modules.
* Download::          Download and extract the packages.
* Install::           Byte-compile and install.
* Minimal Settings::  @file{.emacs} setup.
* Mail Addresses::    Address book definition.
* Folder Definition:: Folder definition.
* Start Wanderlust::  Starting Wanderlust
@end menu


@node MIME Modules, Download, Start Me Up, Start Me Up
@section Installing MIME modules
@cindex MIME modules
@pindex APEL
@pindex FLIM
@pindex SEMI
@pindex tm

SEMI or tm must be installed to make Wanderlust work correctly.

SEMI does not run on Emacs 19.28 or earlier
@footnote{SEMI runs on Emacs 19.34. @*
@uref{http://www.jpl.org/elips/INSTALL-SEMI-ja.html} describes how to.},
so you must install tm, the predecessor of SEMI. (tm version 8.7 or later
is needed.)

However, SEMI is recommended because of its wider functionality.

Refer to the documents of each package for detailed installation procedure.

SEMI and tm can be downloaded from these sites:

@example
@group
SEMI:   ftp://ftp.m17n.org/pub/mule/semi/
tm:     http://cvs.m17n.org/tomo/comp/emacsen/tm/tm-8/
@end group
@end example

You need packages named APEL and FLIM to use SEMI.
You can download APEL and FLIM from following URLs:

@example
@group
APEL:   ftp://ftp.m17n.org/pub/mule/apel/
FLIM:   ftp://ftp.m17n.org/pub/mule/flim/
@end group
@end example

You have to install APEL, FLIM and SEMI in this order.  Generally
@samp{make install} will do the job.  (In XEmacs 21, @samp{make
install-package}.)

Recommended combination of APEL, FLIM and SEMI are following:

@itemize @minus
@item APEL 10.2, FLIM 1.13.2 and SEMI 1.13.7
@end itemize

You can also use many other FLIM/SEMI variants. Combination of the
latest versions should work.  For example, following combination is
confirmed to work.

@itemize @minus
@item APEL 10.2, Chao 1.14.1, REMI 1.14.2
@item APEL 10.2, SLIM 1.14.3, EMY 1.13.9
@end itemize

You have to re-install Wanderlust if you upgraded APEL, FLIM, SEMI or
tm.


@node Download, Install, MIME Modules, Start Me Up
@section Download and Extract the Package
@cindex Download

You can download Wanderlust package from following sites:

Original site:
@example
ftp://ftp.gohome.org/wl/
@end example

Mirrored ftp/http sites:

@example
@group
ftp://ftp.jaist.ac.jp/pub/GNU/elisp/ftp.gohome.org/wl/
http://www.jpl.org/elips/wl/
http://www.ring.gr.jp/archives/text/elisp/wl/
ftp://ftp.ring.gr.jp/pub/text/elisp/wl/
ftp://opaopa.org/pub/mirror/elisp/wl/
@c ftp://roguelife.org/pub/tsumura/wl/
@end group
@end example

Extract the obtained package to your working directory:

@example
@group
% cd ~/work
% tar zxvf wl-@var{version}.tar.gz
% cd wl-@var{version}
@end group
@end example

@subsection To use SSL (Secure Socket Layer)
@cindex SSL
@pindex OpenSSL
@pindex starttls

SSL (Secure Socket Layer) can be used for 
SMTP, IMAP, NNTP and POP connections in Wanderlust.

There are two ways to use SSL. One is to start SSL negotiation just
after the connection establishment (generic way). The other one is to
start SSL negotiation by invoking STARTTLS command in the each session.

To use the formal SSL (generic SSL), you must install @file{ssl.el} in
the @file{utils} directory. OpenSSL command @command{openssl} is also
required to use @file{ssl.el}. You must set @env{PATH} to the directory
that OpenSSL commands are installed.

To use the latter SSL(STARTTLS), you must install starttls package in
addition to above. 
You can download starttls package from the following site.

@example
ftp://opaopa.org/pub/elisp/
@end example

@node Install, Minimal Settings, Download, Start Me Up
@section Byte-compile and install
@cindex Byte-compile
@cindex Compile
@cindex Install
@cindex Makefile
@cindex Make

@subsection Installation

Edit @code{LISPDIR} and @code{EMACS} in @file{Makefile}.
Set the Emacs's command name to @code{EMACS}.
Set package installation directory to @code{LISPDIR}.
Then, please execute following commands.

@example
@group
% make
% make install
@end group
@end example

Destination directory is auto-probed if you leave @code{LISPDIR}
in @file{Makefile} as is. (That is, leave it as @samp{NONE})

If you are using an Emacs variant which does not merge specified directory
to @code{load-path} (e.g. Mule 2.3 based on Emacs 19.28), 
then you will see the error message:

@example
Cannot open load file: mime-setup
@end example

@noindent
In this case, either add destination directories of custom, APEL, FLIM
and SEMI to environmental variable @env{EMACSLOADPATH}, or define
@code{load-path} in @file{WL-CFG} in extracted directory.

If you want to use BBDB, then the necessary modules are byte-compiled
and installed when BBDB directory is added to @code{load-path}.
@xref{BBDB}.

@subsection @file{WL-CFG}

Contents of the file @file{WL-CFG} is loaded under installation if a file
with that name exists in extracted directory. You can use @file{WL-CFG} to
configure @code{load-path} to extra packages such as SEMI if needed.

If you want to specify the install directory of Wanderlust related
files, then set following variables in @file{WL-CFG}

@table @code
@item WL_PREFIX
A directory to install WL modules.
This directory is relative directory from @code{LISPDIR}.
WL modules include @file{wl*.el}, @file{wl*.elc} files.
@c  Modules under the directory @file{util/} are also installed if 
@c it detected as necessary.

@item ELMO_PREFIX
A directory to install ELMO modules.
This directory is relative directory from @code{LISPDIR}.
ELMO modules include @file{elmo*.el}, @file{elmo*.elc} files.
@c  @file{utf7.el}, @file{utf7.elc} are also included in the ELMO.
@end table
  
@noindent
Default value of @code{WL_PREFIX} and @code{ELMO_PREFIX} are @file{wl}.

If you want to install ELMO related files under a sub-directory
such as "elmo" then add following to @file{WL-CFG}:

@lisp
(setq ELMO_PREFIX "elmo")
@end lisp

@subsection Install as a XEmacs package
@cindex XEmacs package
@cindex XEmacs package install
@cindex Package, XEmacs
@cindex Package install, XEmacs
@c @cindex install-package

It is possible to install Wanderlust as one of packages of XEmacs (21.0
or later). Configuration for autoload and icon-path in local
@file{~/.emacs} files are no longer necessary, if you install Wanderlust
as a package.

Follow the next example to install Wanderlust as an XEmacs package.

@example
@group
% vi Makefile
% make package
% make install-package
@end group
@end example

package directory is auto-probed, if SEMI is installed.
(you can also specify it with @code{PACKAGEDIR} in @file{Makefile})

@subsection Run in place

If wl and elmo directories are defined in @code{load-path}, then
byte-compilation and installation are not necessary to start Wanderlust.
For example, if package is extracted in @file{~/work}, Wanderlust can be
invoked with following setting in @file{~/.emacs}.

@lisp
@group
(add-to-list 'load-path "~/work/wl-@var{version}/wl")
(add-to-list 'load-path "~/work/wl-@var{version}/elmo")
@end group
@end lisp

@subsection Manual

Manual is described in Info format. Please do following.

@example
@group
% make info
% make install-info
@end group
@end example

If you install Wanderlust as a XEmacs package, Info file is already
installed too, so there are no need of these commands.

Manual directory is automatically detected. Of course, it can be
configured by @code{INFODIR} in @file{Makefile}.

You can read manual at the following URL:

@example
http://www.gohome.org/wl/doc/wl-euc_toc.html
@end example

@node Minimal Settings, Mail Addresses, Install, Start Me Up
@section Set up .emacs
@cindex Minimal Settings
@cindex Settings
@cindex Configuration
@cindex .emacs
@cindex .wl

The Wanderlust package contains two module groups.

@table @samp
@item ELMO (elmo-*.el)
These modules show everything as folders. This is the back-end for WL.
@item WL (wl-*.el)
These modules controls the behavior of main body of Wanderlust.
They are also the front-end for ELMO.
@end table

You can customize the  behavior of Wanderlust by changing the value
of environmental variables which begins with @code{elmo-} and @code{wl-}.

The minimal requirement for settings is as the following.

@lisp
@group
;; @r{The setting to use SEMI/tm}
(load "mime-setup")

;; @r{autoload configuration}
;; @r{(These are not required if Wanderlust is installed as XEmacs package)}
(autoload 'wl "wl" "Wanderlust" t)
(autoload 'wl-draft "wl-draft" "Write draft with Wanderlust." t)

;; @r{Directory where icons are placed (XEmacs or Emacs 21).}
;; @r{Default: @code{nil}.}
;; @r{(This is not required if Wanderlust is installed as XEmacs package)}
(setq wl-icon-dir "~/work/wl/etc")

;; @r{SMTP server for mail posting. Default: @code{nil}}
(setq wl-smtp-posting-server "your.smtp.server.com")
;; @r{NNTP server for news posting. Default: @code{nil}}
(setq wl-nntp-posting-server "your.nntp.server.com")
@end group
@end lisp

@file{~/.wl} is automatically loaded when Wanderlust starts up (if such a
file exists). So it is convenient to gather Wanderlust specific settings
in @file{~/.wl}. Settings for "face" must be written in @file{~/.wl},
because you can't write them in @file{.emacs}
(if you write it to @file{.emacs}, you'll get an error).
@xref{Highlights}.

All above described settings except (load "mime-setup") and autoload
configuration can be written in
@file{~/.wl}).

@subsection @code{mail-user-agent}
@cindex Default Mailer
@cindex Mailer, Default
@vindex mail-user-agent
@findex compose-mail

If you write following setting in you @file{.emacs}, you can
start Wanderlust draft mode by typing @kbd{C-x m} (@code{compose-mail}). 
This means it enables you to run Wanderlust as a default mail composer
 of Emacsen.

It is effective only when your Emacs can define @code{mail-user-agent}.
@xref{Mail Methods, , ,emacs-ja, The Emacs Editor}.

@lisp
@group
(autoload 'wl-user-agent-compose "wl-draft" nil t)
(if (boundp 'mail-user-agent)
    (setq mail-user-agent 'wl-user-agent))
(if (fboundp 'define-mail-user-agent)
    (define-mail-user-agent
      'wl-user-agent
      'wl-user-agent-compose
      'wl-draft-send
      'wl-draft-kill
      'mail-send-hook))
@end group
@end lisp


@node Mail Addresses, Folder Definition, Minimal Settings, Start Me Up
@section Address book
@cindex Address book Definition
@cindex .addresses
@cindex Alias, Address

The file @file{~/.addresses} is a simple address book for Wanderlust.
Make address file @file{~/.addresses}, and edit to suit your requirement.

The data written in @file{~/.addresses} are used for address completion
under draft editing mode. Furthermore, they are used when showing names
in summary display mode. You can safely skip this section, if you don't
want to customize address completion and summary display.
It is possible to add/change/remove addresses from @file{~/.addresses} in
summary buffer after Wanderlust is invoked. @refill

The format is very simple. Like this. @refill

@example
@group
#
# @r{Lines begin with @samp{#} are comment.}
# @r{Empty lines are ignored}
#
# @r{Format of each line:}
# @var{email-address}  "@var{nickname} "@var{realname}"
#
teranisi@@gohome.org            "Yuuichi"      "Yuuichi Teranishi"
foo@@bar.gohome.org             "Mr. Foo"    "John Foo"
bar@@foo.gohome.org             "Mr. Bar"    "Michael Bar"
@end group
@end example

@noindent
One line defines one persons description.

Actually, in default setup, @var{nickname} is used in summary-mode and
@var{realname} is used in draft preparation mode. This behavior is
better understood if you try it and confirmed the function first. You
can write and try a small definition, so you will know the idea of the
address book before writing a big one.

And, if MH alias file is specified in variable @code{wl-alias-file},
it is used as an address information in the draft preparation mode.

If variable @code{wl-use-ldap} is non-nil (initial setting is
@code{nil}), address completion in draft mode uses LDAP information.

If you use LDAP, you have to set @code{wl-ldap-server},
@code{wl-ldap-port} and @code{wl-ldap-base} properly. If your emacs does
not have LDAP feature as built-in feature (Currently only XEmacs can
have built-in LDAP feature), you have to set command exec @env{PATH} to
the program @command{ldapsearch}.

@node Folder Definition, Start Wanderlust, Mail Addresses, Start Me Up
@section Folder Definition
@cindex Folder Definition
@cindex .folders

You can skip this section because it is possible to add/edit the
subscribe folders from the buffer for list of folders.

Define the folders you want to subscribe in file @file{~/.folders}.  The
contents written in @file{~/.folders} become the folders which you
subscribe to as it is.

Format for @file{~/.folders} is very simple. Here is an example:

@example
@group
#
# @r{Lines begin with @samp{#} are comment.}
# @r{Empty lines are ignored}
#
# @var{folder name}  "@var{folder nickname}"
# @r{(nicknames are not necessary)}
#
%inbox  "Inbox"
+trash  "Trash"
+draft  "Drafts"
%#mh/Backup@@my.imap.server.com "Sent"
# Folder Group
Emacsen@{
    %#mh/spool/wl            "Wanderlust ML"
    %#mh/spool/elips         "ELIPS ML"
    %#mh/spool/apel-ja       "APEL Japanese ML"
    %#mh/spool/xemacs-beta   "XEmacs beta"
    -fj.news.reader.gnus@@other.nntp.server.com "Gnus Net news"
    *-fj.editor.xemacs,-fj.editor.mule,-fj.editor.emacs "fj's Emacsen"
@}
#
# @r{If folder name ends with @samp{/}, that means an `access group',}
# @r{all subfolders automatically included in one folder group.}
#
%#mh/expire@@localhost /
# @r{All MH folders are included in one folder group.}
+ /
@end group
@end example

Each line contains one folder you want to read. The definition of
folders will be explained in detail in the next section.

The part surrounded by @samp{@var{group name}@{} and @samp{@}} will
become one folder group.  One folder group is treated as a directory
which can bed opened and closed in folder mode. It is convenient for
collecting some folders and putting them in order.

Please note that @samp{@var{group name}@{} and @samp{@}} occupies one
line and you have to write it that way (It is because the parser sucks).

There are two types of groups. One is like @samp{Emacsen} from above
example which the user chooses his favorite folders as a group.

The other one is @dfn{access group} like @samp{+} from above example.
It makes all the sub-folders in a folder to a group.  (It differs from
the type of the folder. For example, @samp{+} makes entire MH
sub-directories to one group)

This behavior is better understood if you try it and confirmed the
function first. You can write and try a small folder definition, so you
will know the idea of the folder function before writing the real one.

@node Start Wanderlust,  , Folder Definition, Start Me Up
@section Start Wanderlust
@cindex Start Wanderlust

If installation and configuration worked well, you can invoke Wanderlust by
typing following command in Emacs.

@example
M-x wl
@end example

@noindent
After initialization, Folder Mode which shows the list of folders will appear.
That means the folders you defined in the @file{~/.folders} are listed
If you start Wanderlust with prefix argument like @kbd{C-u M-x wl}, you
can skip folder checking.


@node Folders, Folder, Start Me Up, Top
@chapter Wanderlust's folders 
@cindex Folder Type

This chapter describes the folder types which Wanderlust is able to handle.

Wanderlust uses ELMO as it's interface, so every folder types supported
by ELMO is usable in Wanderlust.

As of version @value{VERSION}, 10 types of folders are predefined. These are
IMAP, NNTP, LocalDir(MH), News Spool, POP, Archive, Multi, Filter, Pipe
and Internal folder types.

@menu
* IMAP Folder::              @samp{%} -- IMAP folder
* NNTP Folder::              @samp{-} -- NNTP folder
* MH Folder::                @samp{+} -- MH folder
* Maildir Folder::           @samp{.} -- Maildir folder
* News Spool Folder::        @samp{=} -- News spool folder
* Archive Folder::           @samp{$} -- Archive folder
* POP Folder::               @samp{&} -- POP folder
* Multi Folder::             @samp{*} -- Multi folder
* Filter Folder::            @samp{/} -- Filter folder
* Pipe Folder::              @samp{|} -- Pipe folder
* Internal Folder::          @samp{'} -- Internal folder
@end menu


@node IMAP Folder, NNTP Folder, Folders, Folders
@section IMAP Folder
@cindex IMAP Folder
@cindex @samp{%}
@cindex RFC 2060
@cindex IMAP4rev1

A folder to access e-mails via IMAP4rev1 protocol (RFC 2060).

Format:

@example
@group
@samp{%} @var{mailbox} [@samp{:} @var{username} [@samp{/} @var{authenticate-type}]][@samp{@@} @var{hostname}][@samp{:} @var{port}][@samp{!}]
@end group
@end example

You can specify @code{login} (encoded password transmission),
@code{cram-md5} (CRAM-MD5 authentication), @code{digest-md5} (DIGEST-MD5
authentication) or @code{plain} (or @code{nil}, plain password
transmission) as @var{authenticate-type}.  (To use CRAM-MD5 or
DIGEST-MD5 authentication, you must install @file{utils/sasl} package.)

default:

@example
@var{username}  -> The value of @code{elmo-default-imap4-user}.
             Initial setting is @env{USER} environment variable or
             @env{LOGNAME} environment variable or return value of
             @code{(user-login-name)}.
@var{authenticate-type} -> The value of @code{elmo-default-imap4-authenticate-type}.
             Initial setting is "auth".
@var{hostname}  -> The value of @code{elmo-default-imap4-server}.
             Initial setting is "localhost".
@var{port} -> The value of @code{elmo-default-imap4-port}.
             Initial setting is 143.
@end example

You can omit the @var{hostname} from folder names if you set
@code{elmo-default-imap4-server} as your main IMAP server.
For example, you can specify a folder as @samp{foo%imap@@gateway} even
if you have to go through a firewall.

SSL (Secure Socket Layer) connection will be used if a folder name ends
with @samp{!}. Or, if the value of @code{elmo-default-imap4-stream-type}
is non-nil, SSL will be the default connection.  If a folder name ends
with @samp{!!}, STARTTLS connection will be established.  If the value
of @code{elmo-default-imap4-stream-type} is @code{starttls}, STARTTLS
will be the default connection.

If you specify @code{login}, @code{cram-md5} or @code{digest-md5} as
authentication method, the password is sent in encoded form. But, if
your server is unable to receive an encoded password, authentication
will fall back to @code{plain} (that is, sending password in raw format)
after confirmation to user. If @code{elmo-imap4-force-login} is non-nil,
authentication will fall back to @code{plain} without confirmation
(default value is @code{nil}).

Example:

@example
@group
%inbox     -> IMAP mailbox "inbox"
%#mh/inbox -> IMAP mailbox "#mh/inbox"

%inbox:hoge -> IMAP mailbox "inbox" of user "hoge".
%inbox:hoge/login@@server1
            -> server1's IMAP mailbox "inbox"
               of user "hoge", with plain password authentication
               ('plain).
@end group
@end example

@subsection International mailbox names (Modified UTF7)
@cindex Modified UTF7
@cindex UTF7
@cindex UTF8
@cindex Unicode
@pindex Mule-UCS
@pindex ucs-conv

You can use international mailbox names in @var{mailbox} part, if you
are using Emacs which can treat unicode and
@code{elmo-imap4-use-modified-utf7} is set to non-nil value (default
value is @code{nil}).

Currently, following Emacsen can treat unicode.

@itemize @bullet
@item Emacs 20.3 or later + Mule-UCS

If you installed Mule-UCS package, Emacs can treat unicode.
You can obtain Mule-UCS package from following URL.

@example
ftp://ftp.m17n.org/pub/mule/Mule-UCS/
@end example

@item XEmacs 21.2.13 or later + ucs-conv package

By default, XEmacs 21 cannot treat unicodes, but if you installed
ucs-conv package, it can.
You can obtain ucs-conv package from following anonymous CVS.

@example
@group
cvs -d :pserver:anonymous@@cvs.m17n.org:/cvs/root login
Password: @var{NULL} (Just enter return key)
cvs -d :pserver:anonymous@@cvs.m17n.org:/cvs/root checkout ucs-conv
@end group
@end example

You also need utf7 conversion programs, @command{u7tou8} and
@command{u8tou7} to use international mailbox name in the current
XEmacs.  These programs are included in the UTF7 package which can be
obtained from following URL.

@example
ftp://ftp.ifcss.org/pub/software/unix/convert/utf7.tar.gz
@end example
@end itemize

@node NNTP Folder, MH Folder, IMAP Folder, Folders
@section NNTP Folder
@cindex NNTP Folder
@cindex @samp{-}

A folder to access USENET news via NNTP protocol (RFC 977).
One newsgroup is treated as a folder.

Format:

@example
@group
@samp{-} @var{newsgroup} [[@samp{:} @var{username}][@samp{@@} @var{hostname}][@samp{:} @var{port}]][@samp{!}]
@end group
@end example

default:
@example
@var{hostname}  -> The value of @code{elmo-default-nntp-server}.
             Initial setting is @samp{localhost}.
@var{username}  -> The value of @code{elmo-default-nntp-user}. 
             Initial setting is @code{nil}.
@var{port}      -> The value of @code{elmo-default-nntp-port}.
             Initial setting is 119.
@end example

AUTHINFO is used as authentication method if the @var{username} is non-nil.
SSL will be default method if @code{elmo-default-nntp-stream-type} is non-nil even
if the folder name doesn't end with @samp{!}.
If a folder name ends with @samp{!!}, STARTTLS connection will be established.
if the value of @code{elmo-default-nntp-stream-type} is @code{starttls},
STARTTLS will be the default connection.

Example:

@example
@group
-fj.rec.tv            -> Newsgroup @samp{fj.rec.tv}.
-fj.rec.tv@@newsserver -> Newsgroup @samp{fj.rec.tv} on @samp{newsserver}.
@end group
@end example

@node MH Folder, Maildir Folder, NNTP Folder, Folders
@section MH Folder
@cindex MH Folder
@cindex @samp{+}
@pindex MH

A folder to access MH format mail (1 file is 1 mail).

Format:

@example
@samp{+} @var{directory-name}
@end example

Normally, @var{directory-name} is an relative path to the variable
@code{elmo-localdir-folder-path} (default is @file{~/Mail}), but if it
starts with @samp{/} or @samp{~}, then it is treated as an absolute path
(this is also true for drive-letters).

Message number is used for the name of the message file.

Example:

@example
@group
+inbox         -> @file{~/Mail/inbox}
+from/teranisi -> @file{~/Mail/from/teranisi}
+~/test        -> @file{~/test}
@end group
@end example

@node Maildir Folder, News Spool Folder, MH Folder, Folders
@section Maildir Folder
@cindex Maildir Folder
@cindex @samp{.}
@pindex Maildir

A folder to access to Maildir format (1 file is 1 mail).

Format:

@example
@samp{.} [@var{directory-name}]
@end example

Normally, @var{directory-name} is a relative path to the variable
@code{elmo-maildir-folder-path} (default is @file{~/Maildir}), but if it
starts with @samp{/} or @samp{~}, then it is treated as an absolute path
(this is also true for drive-letters).

Maildir contains @file{cur}, @file{new} and @file{tmp} subdirectories.
Messages are contained in the @file{cur} directory.  All message files
in the @file{new} directory are moved to @file{cur} directory when you
access to the folder. All message files contained in the @file{tmp}
directory and not accessed for 36 hours are deleted.

This behavior conforms to the @uref{http://cr.yp.to/proto/maildir.html}.

Example:

@example
@group
.              -> @file{~/Maildir}
.inbox         -> @file{~/Maildir/inbox}
.from/teranisi -> @file{~/Maildir/from/teranisi}
.~/test        -> @file{~/test}
@end group
@end example


@node News Spool Folder, Archive Folder, Maildir Folder, Folders
@section News Spool Folder
@cindex News spool Folder
@cindex @samp{=}
@pindex gnspool

This folder handles locally saved news articles which are proposed by
Mew/IM.  You can also read articles directly from a spool-file which is
retrieved by an utility like @command{gnspool}.

Format:

@example
@samp{=} @var{directory-name}
@end example

@var{directory-name} is a sub-directory to the directory defined by
variable @code{elmo-localnews-folder-path} (default is @file{~/News})
You can use @samp{.} as directory delimiter as well as @samp{/}.

Example:

@example
@group
=fj/os/os2         -> @file{~/News/fj/os/os2}
=fj.os.bsd.freebsd -> @file{~/News/fj/os/bsd/freebsd}
@end group
@end example


@node Archive Folder, POP Folder, News Spool Folder, Folders
@section Archive Folder
@cindex Archive Folder
@cindex @samp{$}
@c @pindex ange-ftp

This method can handle archive files, which are compressed by utilities
such as Info-ZIP or LHA, as one folder.

Format:

@example
@group
@samp{$} @var{path-name} [@samp{;} @var{archiver-type} @samp{;} @var{prefix}]
@end group
@end example

@var{path-name} is the relative path from
@code{elmo-archive-folder-path} (initial setting is @file{~/Mail}).  If
@var{path-name} begins with @samp{/} or @samp{~} or `drive-letter of
DOS', @var{path-name} is treated as absolute path.  ange-ftp format is
also permitted under the environment of ange-ftp, efs.

The actual file name of the archive folder is
@code{elmo-archive-basename} (Initial setting is @file{elmo-archive})
under the @var{path-name}. If a file named @var{path-name} exists, it is
treated as folder. The suffix is automatically decided for
@var{archiver-type}.

If @var{archiver-type} is omitted, @code{elmo-archive-default-type}
(Initial setting is @code{zip}) is referred.

@var{prefix} specifies the internal directory structure of the archive.
For example, if the ML server is fml, @file{msend.tar.gz} has a
structure like @file{spool/1}, so you have to specify @samp{spool} as
@var{prefix}.

Example:

@example
@group
$teranisi         -> @file{~/Mail/teranisi/elmo-archive.zip}
$bsd/freebsd;lha  -> @file{~/Mail/bsd/freebsd/elmo-archive.lzh}
$/foo@@server:~/bar;zoo     -> @file{~/bar/elmo-archive.zoo} on ftp server
$d:/msend.tar.gz;tgz;spool -> @file{d:/msend.tar.gz}
@end group
@end example

@menu
* Archiver::     Archivers supported
* Archive Tips:: TIPS
* Archive Vars:: Customization
@end menu


@node Archiver, Archive Tips, Archive Folder, Archive Folder
@subsection Supported Archives
@cindex Archiver
@pindex LHA
@pindex Info-ZIP
@pindex UNZIP
@pindex ZOO
@pindex RAR
@pindex TAR
@pindex GNU TAR

By default, following archives are supported.

@example
@group
        LHA, Info-ZIP/UNZIP, ZOO, RAR  ;; full-access
        GNU TAR('tgz, 'tar)            ;; read-only
@end group
@end example

If your archiver can include multiple files in one archive, you have a
possibility use it as an archiver of Wanderlust (ARJ/UNARJ, ARC is one
of the candidate. TAR is supported read-only because it cannot delete
file in the archive (@code{mv})).

@command{gzip}, @command{bzip}, @command{bzip2} cannot be used as an
archiver of Wanderlust because they cannot include multiple
files. Archivers that cannot extract files to standard output are also
not supported.

@subsection OS specific information about archiver.

Behaviors of the following archivers are confirmed by further experiences.
(@samp{*} mark means recommended archiver).

@example
[OS/2]  Warp4.0J(w/o VoiceType)+Fx00505/emx0.9c(fix04)/PMMule,EmacsPM
         LHA  OS/2 version Rel.2.06b    Feb 18, 1998
        *UnZip 5.32 of 3 November 1997, by Info-ZIP.
        *Zip 2.2 (November 3rd 1997).
         Zoo archiver, zoo 2.1 $@asis{}Date: 91/07/09 02:10:34 $
         GNU tar version 1.10 - AK 2.58 (DBCS/SJIS) 981216(homy) version
         gzip 1.2.4 (18 Aug 93) + bzip2 patch(by Iida-san)

[UN|X]  FreeBSD 2.2.7-RELEASE, Linux 2.0.30, Solaris2.6, HP-UX 9.07
         LHa for UNIX  V 1.14c
         UnZip 5.32 of 3 November 1997
         Zip 2.2 (November 3rd 1997)
         GNU tar 1.12 (1.11.x is no good)
         gzip 1.2.4 (18 Aug 93)

[Win32] Win.98/Meadow
         Lha32 version 1.28
         Zip 2.2
         UnZip 5.40
         GNU tar 1.11.8 + 1.5(WIN32)
         GZIP 1.2.4
         RAR 2.06
@end example

* Caution about LHA

If you are an OS/2 user, Peter Fitzsimmons's LH/2 is not supported.
Hiramatsu version of LHA is only supported.
In Win32, LHa32 is only supported (DOS version is no good).

* Caution about GNU tar

You have to take care about GNU tar's version because many version has
problem on deleting file from archive.

Please test @option{--delete} @option{-f} options work. Otherwise, your
archive will be destroyed. No problem is reported on above versions of
GNU tar.


@node Archive Tips, Archive Vars, Archiver, Archive Folder
@subsection TIPS
@cindex Archive Tips

For comfortable migration, usage of @code{wl-summary-archive}
(@pxref{Archive}) or Expire (@pxref{Expire}) is recommended.  To treat
archive folders created by expiration, you must set non-nil value to
@code{elmo-archive-treat-file}.

On the OS/2, there is a great difference between Mule2.3(19.28) and Emacs20.2
in processing speed. For comfortable use, Emacs20 is recommended.
(If re-search's performance is the problem, 19.3x or later may be okay.)

If many files are included in one archive,
it takes long time to access to the archive folder because 
archiver starting overhead is increased (especially LHA).
150-200 messages in one archive is recommended.

Of course, following is possible @t{:-)} 
(meanings of these variables are described later.)

@lisp
@group
(setq wl-fcc "$backup")
(setq wl-trash-folder "$trash;lha")
@end group
@end lisp

@node Archive Vars,  , Archive Tips, Archive Folder
@subsection Variables About Archive Folder
@cindex Archive variables

@table @code
@item elmo-archive-default-type
@vindex elmo-archive-default-type
The initial setting is @code{zip}.
Set archiver type by symbol. 

@item elmo-archive-@var{type}-method-alist
@vindex elmo-archive-TYPE-method-alist
Define archiver @var{type}'s methods.
(@var{type} is @samp{lha}, @samp{zip}, @samp{zoo}, @samp{tgz} etc)
Each element of the alist is following.

@example
@group
(@var{action} . (@var{exec-name} @var{options}))   ;; external program and its option.
(@var{action} . @var{function})              ;; function
@end group
@end example

Currently available actions are following.

@example
@group
'ls, 'cat ('cat-headers)        ;; Minimal setting(read-only)
'mv ('mv-pipe), 'rm ('rm-pipe)  ;; full-access (with above)
'cp ('cp-pipe)                  ;;
@end group
@end example

@noindent
In above actions, 
actions enclosed with braces are optional (They are used for better
performance).

@item elmo-archive-suffix-alist
@vindex elmo-archive-suffix-alist
An alist of archiver-type (symbol) and suffix.

@item elmo-archive-file-regexp-alist
@vindex elmo-archive-file-regexp-alist
An alist of a regexp to get file number from list output of archiver
and archiver-type (symbol).

@item elmo-archive-method-list
@vindex elmo-archive-method-list
A list of elmo-archive-@var{type}-method-alist
(@var{type} is a symbol of archiver-type).

@item elmo-archive-lha-dos-compatible
@vindex elmo-archive-lha-dos-compatible
The initial setting is @code{t} on OS/2 and Win32.  If non-nil, LHA is
DOS (Mr. Yoshizaki original) compatible.

@item elmo-archive-cmdstr-max-length
@vindex elmo-archive-cmdstr-max-length
The initial setting is 8000.

Max length of command line argument for external archiver program.
Emacs does not have a limit of command line byte length, but some OS
(e.x OS/2) have. It depends on the OS. Archive folder is affected by
this limit because it calls external archiver program directly (not
called via shell).  For example, you cannot delete messages if archiver
program must receive larger bytes of arguments to delete.  OS/2 have a
command line argument limit of 8190 bytes, so we defined default as 8000
with some margin.

However, you don't have an influence of command line argument limit
if the archiver has `actions' to receive target file information from
standard input (@code{rm-pipe}, @code{mv-pipe}, @code{cat-headers} action).
@end table

@node POP Folder, Multi Folder, Archive Folder, Folders
@section POP Folder
@cindex POP Folder
@cindex @samp{&}
@cindex RFC 1939
@cindex POP3
@cindex APOP

A folder to access e-mails via POP3 protocol (RFC 1939).

Format:

@example
@group
@samp{&} [@var{username}][[@samp{/} @var{authenticate-type}][@samp{@@} @var{hostname}][@samp{:} @var{port}]][@samp{!}]
@end group
@end example

You can specify
@samp{user}  (plain password transmission) or @samp{apop}  (APOP authentication)
as @var{authenticate-type}.

default:
@example
@var{username}   -> The value of @code{elmo-default-pop3-user}.
              Initial setting is @env{USER} environment variable or
             @env{LOGNAME} environment variable or return value of
             @code{(user-login-name)}.
@var{authenticate-type} -> The value of @code{elmo-default-pop3-authenticate-type}.
              Initial setting is @samp{user}.
@var{hostname}   -> The value of @code{elmo-default-pop3-server}.
              Initial setting is @samp{localhost}.
@var{port}       -> The value of @code{elmo-default-pop3-port}.
              Initial setting is 110.
@end example

Example:

@example
@group
&hoge@@localhost -> access to localhost as user @samp{hoge}.
&hoge@@popserver:109 -> access to the server "popserver" on port 109
                        as user @samp{hoge}.
@end group
@end example

To use apop as an @var{authenticate-type}, @file{md5.el} is needed
(XEmacs doesn't need @file{md5.el}).  @file{md5.el} is included in
@file{utils/sasl/lisp/} or Emacs/W3 package
(@uref{http://www.cs.indiana.edu/elisp/w3/docs.html}) or LCD archive
(GPL2).

If the last character of the folder name is @samp{!}, Wanderlust
connects to the POP server via SSL (Secure Socket Layer).  If you set
non-nil value to @code{elmo-default-pop3-stream-type}, you don't have to put
@samp{!} in the end of the folder name to use SSL. If a folder name ends
with @samp{!!}, STARTTLS connection will be established.  if the value
of @code{elmo-default-pop3-stream-type} is @code{starttls}, STARTTLS will be the
default connection.

@node Multi Folder, Filter Folder, POP Folder, Folders
@section Multi Folder
@cindex Multi Folder
@cindex @samp{*}
@cindex Folder, Multiple
@cindex Folder, Marge

A folder to access to a folder which collects messages from
multiple folders virtually.

Format:

@example
@group
@samp{*} @var{folder-1} [@samp{,} @var{folder-2}] @dots{} [@samp{,} @var{folder-N}]
@end group
@end example

After @samp{*} character, specify multiple folders you want to collect
separated by @samp{,} like
@samp{@var{folder-1},@var{folder-2},@dots{},@var{folder-N}}.

Example:

@example
@group
*-fj.editor.xemacs,-fj.editor.mule,-fj.editor.emacs
-> -fj.editor.xemacs, -fj.editor.mule and -fj.editor.emacs are
   treated as one folder.

*+inbox,-fj.rec.tv,%inbox
-> +inbox, -fj.rec.tv and %inbox are treated as one folder.
@end group
@end example


@node Filter Folder, Pipe Folder, Multi Folder, Folders
@section Filter Folder
@cindex Filter Folder
@cindex @samp{/}
@cindex Folder, Filtering
@cindex Folder, Virtual

A folder to access to a folder which collects all messages that 
satisfy a condition virtually.

Format:

@example
@samp{/} @var{condition} @samp{/} @var{target-folder}
@end example

In the @var{condition} part, you can specify following.

@enumerate
@item
Partial filter: @samp{first:@var{number}}, @samp{last:@var{number}}

first: @var{number} messages are picked from top of folder.
last:  @var{number} messages are picked from bottom of folder.

Example:

@example
@group
/last:10/-fj.os.linux -> Latest 10 messages from -fj.os.linux are picked.
/first:20/%inbox      -> First 20 messages from %inbox are picked.
@end group
@end example

@item
Date filter: @samp{since:@var{date}}, @samp{before:@var{date}}

since: only messages arrived since @var{date} are picked.
before: only messages arrived before @var{date} are picked.

You can specify following as @var{date}.

@example
@group
yesterday ->  a day before today.
lastweek  ->  same day of last week.
lastmonth ->  same day of last month.
lastyear  ->  same day of last year.
@var{number}daysago -> @var{number} days ago. (e.x. '3daysago')
@var{day}-@var{month}-@var{year} -> specify date directly (ex. 1-Nov-1998)
@end group
@end example

Example:

@example
@group
/since:3daysago/+inbox -> messages arrived since 3 days ago in +inbox
                          are picked.
/before:yesterday/+inbox -> messages arrived before yesterday in +inbox
                          are picked. 
@end group
@end example

@item
Field filter: @samp{@var{field}:@var{value}}

All messages that have @var{field} and its value is @var{value} are picked.
@var{field} and @var{value} are case insensitive.

Example:

@example
@group
/from:teranisi/+inbox -> In +inbox, messages which have From: field
                         and its value includes "teranisi" string are picked.
/body:foo/%inbox      -> In %inbox, messages which have "foo" text
                         are picked.
@end group
@end example

@item
Complexed condition

If you combine conditions by character @samp{|}, it is considered as OR condition. @samp{&} is considered as AND condition, likewise.
Condition can be grouped by parentheses (@samp{(}, and @samp{)}).

@samp{/tocc:xxxx/} is an abbreviation of @samp{/to:xxxx|cc:xxxx/}.
@samp{/!tocc:xxxx/} is an abbreviation of @samp{/!to:xxxx&!cc:xxxx/}.

Example:

@example
@group
/from:teranisi&!to:teranisi/+inbox
                      -> In +inbox, messages are picked if the message's 
                         From: field includes "teranisi" and 
                         To: field doesn't include "teranisi".

/tocc:"Yuuichi Teranishi"/+inbox 
                      -> In +inbox, messages are picked if the
                         message's To: field or Cc: field includes 
                         "Yuuichi Teranishi".

/(from:yt|from:teranisi)&subject:report/+inbox
                      -> In +inbox, messages are picked if the message's
                         From: field includes "yt" or "teranisi", and
                        Subject includes "report".
@end group
@end example
@end enumerate

@noindent
Tip for string description:

Space character, @samp{"}, @samp{/},@samp{)},@samp{|} and @samp{&}
should be enclosed with @samp{"} in @var{value} string.  (@samp{"}
should be escaped with @samp{\} in it).  You can enclose the string with
@samp{"} even it does not contain these characters.

@noindent
Advanced example:

@example
*%inbox,/from:teranisi/%inbox@@server
       -> Messages in %inbox or
          message is in the %inbox@@server folder and it's From field
          includes "teranisi" are collected.

/last:100//to:teranisi/*+inbox,%inbox
       -> Latest 100 messages which is in the +inbox or %inbox folder
          and To: field matches "teranisi".

/from:hogehoge//last:20//tocc:teranisi/%#mh/inbox@@localhost
       -> Pick messages which have From: field and it includes "hogehoge"
          from latest 20 messages in the %#mh/inbox@@localhost
          and To: or Cc: field includes "teranisi".
@end example

@node Pipe Folder, Internal Folder, Filter Folder, Folders
@section Pipe Folder
@cindex Pipe Folder
@cindex @samp{|}
@cindex Get Message
@cindex Download Message
@cindex Incorporate Message

In the pipe folder, messages are automatically transferred from the source
folder to destination folder.

Format:

@example
@samp{|} @var{source-folder} @samp{|} @var{destination-folder}
@end example

When you access to the pipe folder, messages are automatically transferred
from @var{source-folder} to @var{destination-folder}.
It is convenient if you want to download messages to local disk via POP.
For example, if you specify following

@example
|&username@@popserver|+inbox
@end example

@noindent
and access to it, messages are downloaded automatically from
@samp{&username@@popserver} to @samp{+inbox}.

Example:

@example
@group
%inbox|%myinbox   -> Download %inbox to %myinbox.
*&user@@popserver1,&user@@popserver2|+inbox
         -> Download from &user@@popserver1 and &user@@popserver2 to +inbox.
@end group
@end example

After messages are moved, a hook @code{elmo-pipe-drained-hook} is called.

@node Internal Folder,  , Pipe Folder, Folders
@section Internal folder
@cindex Internal Folder
@cindex @samp{'}
@cindex Folder, @samp{$} mark

A folder to access to internal messages of Wanderlust.

Format:

@example
@group
'mark
@r{or}
'cache/00 - 1F
@end group
@end example

A folder named @samp{'mark} is a special virtual folder which collects
messages which have important mark @samp{$}.

You can review important messages at once after you put important marks
on the messages in the different folders.

In this folder, if you delete message, important mark @samp{$} put on
the message is removed.  If you append messages to this folder, the
message will have @samp{$} mark.

(Can't remove important mark @samp{$} on IMAP server from @samp{'mark}
folder.  If you want IMAP folder's message remove from @samp{'mark}
folder, remove important mark at IMAP Folder.)

You can access to the cached messages fetched via network by accessing
to the folders named @samp{'cache/00} - @samp{'cache/1F}. 00 - 1F are
the name of the subdirectories of the cache directory
(@file{~/.elmo/cache}).


@node Folder, Summary, Folders, Top
@chapter Folder mode
@cindex Folder

After you start Wanderlust, folder mode is appeared firstly.
It contains folder list you subscribed.
You can select and edit folders in this mode.

@menu
* Selecting Folder:: Select folder you want to read.
* Folder Manager::   Editing folders.
@end menu


@node Selecting Folder, Folder Manager, Folder, Folder
@section Selecting Folder
@cindex Selecting Folder

@subsection Usage (TIPS)

@subsubsection Check new, unread number

Folder mode looks like this.
(In XEmacs, it looks much nicer @t{;-)})

@example
@group
[-]Desktop:14186/35580/67263
   Inbox:3/10/10
   Trash:2/7/10
   Drafts:0/0/3
   Sent:0/9/348
   [-]Emacsen:0/34/4837
     Wanderlust ML:0/0/558
     ELIPS ML:0/0/626
     tm:0/0/821
     XEmacs Beta:0/29/255
     Mew:0/0/998
     Mule-Win32:0/0/1491
     fj's Emacsen:0/5/88
@end group
@end example


Each line means:

@example
@var{folder-name}:@var{new-number}/@var{unread-number}/@var{all-number}
@end example

@noindent
@kbd{s} key on the folder line updates these numbers.
It changes its color if it has many new messages.

The whole folder mode is a folder group named @samp{Desktop}.
Folder group open/close by return key.
A operation to a folder group is treated as operations on the
children folders.
For example, when you type @kbd{s} on @samp{[-]Emacsen},
six children folders update its unread number status.

@subsubsection Select Folder

To enter summary mode of the folder, type return (or space) key on
the folder line.
If the variable @code{wl-stay-folder-window} has non-nil value, 
summary window appears on the right of the folder mode window.

@subsection Key bindings

Folder mode's key binding (related to selecting folders) is following.

@table @kbd
@item @key{SPC}
@itemx @key{RET}
@kindex @key{SPC} (Folder)
@kindex @key{RET} (Folder)
@findex wl-folder-jump-to-current-entity
Enter to the summary mode of the folder at the current cursor point.
If the cursor is on the top of folder group line, 
the folder group is opened or closed.
When the cursor is on the access group and this command is called 
with prefix argument, folder children list is updated to the newest one.
(Children list is updated recursively if the access folder has hierarchical
structure.)
(@code{wl-folder-jump-to-current-entity})

@item M-@key{RET}
@kindex M-@key{RET} (Folder)
@findex wl-folder-update-recursive-current-entity
Folder children list of the access group at the current cursor point
is updated to the newest one.
(Children list is updated recursively if the access folder has hierarchical
structure.)
(@code{wl-folder-update-recursive-current-entity})

@item w
@kindex w (Folder)
@findex wl-draft
Create a new draft message.
(@code{wl-draft})

@item W
@kindex W (Folder)
@findex wl-folder-write-current-folder
If the current cursor point is on the NNTP folder, create a new draft
message which already has @samp{Newsgroups:} field.  If the current
cursor point is on the folder for mailing list (refile destination),
create a new draft message which already has @samp{To:} field with
guessed mailing list adderss (If @code{wl-subscribed-mailing-list} is
valid list).
(@code{wl-folder-write-current-folder})

@item C-c C-o
@kindex C-c C-o (Folder)
@findex wl-jump-to-draft-buffer
Move to the draft buffer if available.  If multiple draft buffer exists,
moved to one after another.  If prefix argument is specified, load draft
folder's message to the draft buffer and jump to it.
(@code{wl-jump-to-draft-buffer})

@item s
@kindex s (Folder)
@findex wl-folder-check-current-entity
Update new and unread number information of the folder at the current 
cursor point.
(@code{wl-folder-check-current-entity})

@item S
@kindex S (Folder)
@findex wl-folder-sync-current-entity
Update summary information of the folder at the current cursor point.
(@code{wl-folder-sync-current-entity})

@item r s
@kindex r s (Folder)
@findex wl-folder-check-region
Update new and unread number information of the folders in the currently
selected region.
(@code{wl-folder-check-region})

@item r S
@kindex r S (Folder)
@findex wl-folder-sync-region
Update summary information of the folders in the currently selected region.
(@code{wl-folder-sync-region})

@item Z
@kindex Z (Folder)
@findex wl-status-update
Sync up address book status with @file{~/.addresses}'s content.
(@code{wl-status-update})

@item P
@kindex P (Folder)
@findex wl-folder-prev-unread
Jump cursor to the folder which have unread messages on the upward from
current cursor point.
(@code{wl-folder-prev-unread})

@item N
@kindex N (Folder)
Jump cursor to the folder which have unread messages on the downward
from current cursor point.
(@code{wl-folder-next-unread})

@item p
@kindex p (Folder)
Move cursor to the folder on the previous line.
(@code{wl-folder-prev-entity})

@item n
@kindex n (Folder)
Move cursor to the folder on the next line.
(@code{wl-folder-next-entity})

@item J
@kindex J (Folder)
Jump to the folder specified by the user input.
(@code{wl-folder-jump-folder})

@item I
@kindex I (Folder)
@findex wl-folder-prefetch-current-entity
Prefetch new messages of the folder at the current cursor point by
@code{wl-summary-incorporate}.
If the cursor is on the folder group, it is executed recursively.
(@code{wl-folder-prefetch-current-entity})

@item c
@kindex c (Folder)
@findex wl-folder-mark-as-read-all-current-entity
Mark all unread messages of the folder at the current cursor point as read.
If the cursor is on the folder group, it is executed recursively.
(@code{wl-folder-mark-as-read-all-current-entity})

@item f
@kindex f (Folder)
@findex wl-folder-goto-first-unread-folder
Enter summary mode of the first unread folder.
(@code{wl-folder-goto-first-unread-folder})

@item E
@kindex E (Folder)
@findex wl-folder-empty-trash
Empty trash.
(@code{wl-folder-empty-trash})

@item o
@kindex o (Folder)
@findex wl-folder-open-all-unread-folder
All unread folder is opened.
(@code{wl-folder-open-all-unread-folder})

@item /
@kindex / (Folder)
@findex wl-folder-open-close
Folder group is opened/closed.
(@code{wl-thread-open-close})

@item [
@kindex [ (Folder)
All folder group is opened.
(@code{wl-folder-open-all})

@item ]
@kindex ] (Folder)
All folder group is closed.
(@code{wl-folder-close-all})

@item q
@kindex q (Folder)
Quit Wanderlust.
(@code{wl-exit})

@item z
@kindex z (Folder)
Suspend Wanderlust.
(@code{wl-folder-suspend})

@item M-s
@kindex M-s (Folder)
Save current folder status.
(@code{wl-save})

@item M-t
@kindex M-t (Folder)
Toggle Wanderlust's offline/online status.
(@code{wl-toggle-plugged})

@item C-t
@kindex C-t (Folder)
Start Wanderlust's plug-status manager.
(@code{wl-plugged-change})
@end table

@subsection Customize variables

@table @code
@item wl-folders-file
@vindex wl-folders-file
The initial setting is @file{~/.folders}.
Subscribed folders are described (saved) in this file.

@item wl-folder-info-save
@vindex wl-folder-info-save
The initial setting is @code{t}.  If non-nil, unread information is
saved and used in the next Wanderlust session.

@item wl-stay-folder-window
@vindex wl-stay-folder-window
The initial setting is @code{nil}.
If non-nil, summary window is appeared on the right side of the folder buffer.

@item wl-folder-window-width
@vindex wl-folder-window-width
The initial setting is 20.
Folder mode's window width when @code{wl-stay-folder-window} is non-nil.

@item wl-folder-many-unsync-threshold
@vindex wl-folder-many-unsync-threshold
The initial setting is 70.
If the number of unread messages is more than this value,
folder color is changed.

@item wl-highlight-folder-by-numbers
@vindex wl-highlight-folder-by-numbers
This option controls how to highlight each line in the folder buffer.
The default value is @code{t}, highlighting with various colors based on
the message numbers.  If it is @code{nil}, highlighting with various
colors based on the folder status.  In addition, if it is a number
(e.g. 1), highlighting will be done based on both the message numbers
and the folder status.

@item wl-folder-desktop-name
@vindex wl-folder-desktop-name
The initial setting is @samp{Desktop}.
The name of top folder group.

@item wl-folder-petname-alist
@vindex wl-folder-petname-alist
The initial setting is @code{nil}.
An alist of folder's realname and its nickname.

@item wl-folder-access-subscribe-alist
@vindex wl-folder-access-subscribe-alist
The initial setting is @code{nil}.

Control automatic subscribing and unsubscribing of the children list
of access groups.

Each element is:

@example
(@var{regexp-of-access-folder} . (@var{subscribe-flag} @var{regexp-of-folders} @dots{}))
@end example

@noindent
If @var{subscribe-flag} is non-nil, folders which have name matched to
@var{regexp-of-folders} are displayed. Otherwise, hidden.  However,
already unsubscribed folder is not displayed even when the
@var{subscribe-flag} is non-nil. Multiple @var{regexp-of-folders} can be
specified.

Example:

@lisp
@group
'(("^-fj$" . (t   "^-fj\\.\\(comp\\|editor\\|mail\\)"
                  "^-fj\\.\\(net\\|news\\|os\\|rec\\)"))
  ("^-$" . (t   "^-\\(fj\\|tnn\\|japan\\|gnu\\|comp\\)"))
  ("^\\+ml$" . (nil "^\\+ml$" "^\\+ml/tmp")))
@end group
@end lisp

@item wl-folder-hierarchy-access-folders
@vindex wl-folder-hierarchy-access-folders
The initial setting is the list shown below:

@lisp
@group
("-" "-alt")
@end group
@end lisp

@noindent
A list of access groups which creates children folder list hierarchically.

For example, if you specify
@code{wl-folder-hierarchy-access-folders} like following,

@lisp
@group
(setq wl-folder-hierarchy-access-folders
     '("-" "-alt" "-japan" "-comp" "-comp.unix"))
@end group
@end lisp

@noindent
such access group hierarchy is obtained.

@example
@group
   [-]-:912/912/3011
     [-]-fj:674/674/1314
       -fj.comp.announce:0/0/2
       -fj.comp.dev.cdrom:0/0/0
       @dots{}
     [+]-japan:238/238/1688
     [-]-comp:0/0/4
       [-]-comp.unix:0/0/0
         -comp.unix.admin:0/0/0
         -comp.unix.dos-under-unix:0/0/0
         -comp.unix.programmer:0/0/0
         [-]-comp.unix.bsd:0/0/23
           -comp.unix.bsd.freebsd.announce:0/0/0
     @dots{}
@end group
@end example

If you opened @samp{-} in this example, only the direct children is created
(@samp{-fj}, @samp{-japan}, @samp{-tnn}, @dots{}).
second hierarchy (@samp{-fj.comp.announce}, @dots{}, @samp{-comp.unix}, @dots{})
is not created until the children access group is opened.
@end table


@node Folder Manager,  , Selecting Folder, Folder
@section Editing Folders
@cindex Folder Manager
@cindex Folder, Edit
@cindex Folder, Subscribe
@cindex Folder, Unsubscribe

As described before, subscribed folder list is saved in @file{~/.folders} file.
But you don't have to edit @file{~/.folders} directly.
You can append, delete, edit folders from folder mode.

@subsection Usage (Tips)

@subsubsection Append Folder

@kbd{m a} appends new folder to the folder mode.
@kbd{m g} appends new folder group.
To append new folder to this group, firstly open it,
then execute append command in the next line.

@subsubsection Edit Folder

You can cut folder by @kbd{C-k}, paste by @kbd{C-y}.
Thus, you can change folder position as if you were editing a normal file.

@subsubsection Create Multi Folder.

@enumerate
@item
Type @kbd{m q} to clear @code{wl-fldmgr-cut-entity-list}.
@item
Cut folder by @kbd{C-k} or copy folder by @kbd{M-c}.
@item
Type @kbd{m m}, then you can create multi folder.
@end enumerate

@subsubsection Delete Nickname, Filter

You can delete nickname or filter by putting ``''(@var{NULL}) from the
minibuffer while appending.

@subsubsection Append Folder to Empty Group

To append new folder to the empty folder group
(after you create folder group by typing @kbd{m g}),
firstly open it, then execute append command in the next line.
If it is closed, folder is appended on the same level with
the above folder group. It is difficult to explain by words so try it.
In other words, appended position depends on the 
above folder group's open/close status.

@subsubsection Charset of the Folders File.

@code{wl-mime-charset} is used for saving @code{wl-folders-file}.

@subsubsection Create Filter

@kbd{m f} adds filter to the folder at the current cursor point.  To
create new filter folder and leave the current folder unchanged, copy it
@kbd{M-c}, make filter @kbd{m f} and paste it @kbd{C-y}.  Multiple
filter can be specified while appending filter.  If you put
``''(@var{NULL}), filter is deleted.

@subsubsection Sort Folders

Sorting of the folders is executed by the function specified by 
@code{wl-fldmgr-sort-func}. 
The initial setting is @code{wl-fldmgr-sort-standard}, 
which sorts alphabetically.
Sorting affects only on the current folder group. It does not 
affect on the child groups.

@subsubsection Hiding Folders in the Access Group

Usually, access group displays all children folders, but you can set
some folders hidden. Following operations are only available on access
group.

Command @code{wl-fldmgr-unsubscribe} (@kbd{u}) toggles the visibility
(subscribe/unsubscribe) of the folder at current cursor point.  Against
this, @code{wl-fldmgr-unsubscribe-region} (@kbd{U}) hides folders in the
specified region.

Note that @code{wl-fldmgr-unsubscribe-region} does not toggle while
@code{wl-fldmgr-unsubscribe} toggles.  These two commands accept prefix
argument and if the argument has positive number, the unsubscribe it.
If the prefix argument has negative value, folder becomes visible and if
zero, folder visibility is toggled.

The other commands, @code{wl-fldmgr-subscribe} and
@code{wl-fldmgr-subscribe-region} are also prepared (not binded to the
key).

Moreover, if @code{wl-fldmgr-cut} or @code{wl-fldmgr-cut-region} is
executed in the access group, they have a same effect with
@code{wl-fldmgr-unsubscribe} and @code{wl-fldmgr-unsubscribe-region}.
The difference is that cut commands deletes folders from the current
buffer.

@subsubsection Operations in the Access Group

You can insert and delete folders in the access group like usual folder
group.  But insert and delete commands can be only available for the
children folders of the access group and they only sets the subscribe
status.  In other words, insertion of the folder means subscribing,
deletion means unsubscribing.
@footnote{In the current implementation, 
it is faster to delete region than to unsubscribe region.}

To update the access group when children folders are inserted or deleted
by other way (other than Wanderlust), 
open the access group by typing @kbd{C-u @key{RET}}.
@xref{Selecting Folder}.

The order of children folders of access group is saved after
insertion/deletion/sorting.
If you set @code{wl-force-fetch-folders} to non-nil or open access group
by typing @kbd{C-u @key{RET}}, disappeared folders are deleted and
newly created folders are inserted on the top of the access group.

@subsection Key bindings
@cindex Keybind, Folder Mode
@cindex Keybind, Folder Buffer

Key bindings on the folder mode related to folder editing are shown below.
All bindings starts with @kbd{m}, and primary commands are binded to 
one stroke key binding.

@table @kbd
@item m a
@kindex m a (Folder)
@findex wl-fldmgr-add
Insert a folder.
(@code{wl-fldmgr-add})

@item +
@itemx m g
@kindex + (Folder)
@kindex m g (Folder)
@findex wl-fldmgr-make-group
Create a folder group.
(@code{wl-fldmgr-make-group})

@itemx m A
@kindex m A (Folder)
@findex wl-fldmgr-make-access-group
Create an access group. 
(@code{wl-fldmgr-make-access-group})

@item m d
@kindex m d (Folder)
@findex wl-fldmgr-delete
Delete folder itself and msgdb.
If the folder itself cannot be deleted like NNTP folder,
only msgdb is deleted.
(@code{wl-fldmgr-delete})

@item R
@itemx m R
@kindex R (Folder)
@kindex m R (Folder)
@findex wl-fldmgr-rename
Change the name of folder or folder group.
msgdb's path is also changed.
(@code{wl-fldmgr-rename})

@item *
@itemx m m
@kindex * (Folder)
@kindex m m(Folder)
@findex wl-fldmgr-make-multi
Create a multi folders in the cutlist (cut, copied folders).
(@code{wl-fldmgr-make-multi})

@item |
@itemx m f
@kindex | (Folder)
@kindex m f (Folder)
@findex wl-fldmgr-make-filter
Create a filter folder. (Put a filter on the folder).
(@code{wl-fldmgr-make-filter})

@item M-c
@itemx m c
@kindex M-c (Folder)
@kindex m c (Folder)
@findex wl-fldmgr-copy
Copy folder (it is not available on folder group).
(@code{wl-fldmgr-copy})

@item M-w
@itemx m W
@kindex M-w (Folder)
@kindex m W (Folder)
@findex wl-fldmgr-copy-region
Copy folders in the specified region.
(@code{wl-fldmgr-copy-region})

@item C-k
@itemx m k
@kindex C-k (Folder)
@kindex m k (Folder)
@findex wl-fldmgr-cut
Cut folder. Folder itself is not deleted.
(@code{wl-fldmgr-cut})

@item C-w
@itemx m C-w
@kindex C-w (Folder)
@kindex m C-w (Folder)
@findex wl-fldmgr-cut-region
Cut folders in the specified region.
(@code{wl-fldmgr-cut-region})

@item C-y
@itemx m y
@kindex C-y (Folder)
@kindex m y (Folder)
@findex wl-fldmgr-yank
Paste folders that are copied or cut (folders in the cut-list).
(@code{wl-fldmgr-yank})

@item m p
@kindex m p (Folder)
@findex wl-fldmgr-set-petname
Put nickname on the folder.
(@code{wl-fldmgr-set-petname})

@item m q
@kindex m q (Folder)
@findex wl-fldmgr-clear-cut-entity-list
Clear the cut-list. (cut, copied folder information is cleared,
you cannot paste after this)
(@code{wl-fldmgr-clear-cut-entity-list})

@item m s
@kindex m s (Folder)
@findex wl-fldmgr-sort
Sort folders in the current folder group.
(@code{wl-fldmgr-sort})

@item m C-s
@kindex m C-s (Folder)
@findex wl-fldmgr-save
Save current folder view to the @file{wl-folders-file}.
(@code{wl-fldmgr-save})
@end table

[Following commands are only available on the access groups]

@table @kbd
@item u
@itemx m u
@kindex u (Folder)
@kindex m u (Folder)
@findex wl-fldmgr-unsubscribe
Set the visibility of folder (subscribe/unsubscribe).
(@code{wl-fldmgr-unsubscribe})

@item U
@itemx r u
@kindex U (Folder)
@kindex r u (Folder)
@findex wl-fldmgr-unsubscribe-region
Set the visibility of the folders (subscribe/unsubscribe) in the
specified region. 
(@code{wl-fldmgr-unsubscribe-region})

@item l
@itemx m l
@kindex l (Folder)
@kindex m l (Folder)
@findex wl-fldmgr-access-display-normal
List folders that are currently available.
(@code{wl-fldmgr-access-display-normal})

@item L
@itemx m L
@kindex L (Folder)
@kindex m L (Folder)
@findex wl-fldmgr-access-display-all
List all folders regardless of the subscription status.
(@code{wl-fldmgr-access-display-all})
@end table


@subsection Customize variables

@table @code
@item  wl-interactive-save-folders
@vindex wl-interactive-save-folders
The initial setting is @code{t}.  If non-nil and folder view is
modified, confirm saving it before Wanderlust or Emacs exits.  If
@code{nil}, save without confirmation.

@item wl-fldmgr-make-backup
@vindex wl-fldmgr-make-backup
The initial setting is @code{t}.  If non-nil, @file{~/.folders.bak} is
created before saving the folder status.

@item wl-fldmgr-sort-func
@vindex wl-fldmgr-sort-func
The initial setting is @code{wl-fldmgr-sort-standard}.  A function to
sort folders.  By default function, folders are sorted alphabetically
and folder group is put on top (when @code{wl-fldmgr-sort-group-first}
is non-nil).

@item wl-fldmgr-sort-group-first
@vindex wl-fldmgr-sort-group-first
The initial setting is @code{t}.  If non-nil,
@code{wl-fldmgr-sort-standard} precedes folder group.  If @code{nil}, it
does not care whether it is folder group or not.

@item wl-folder-check-async
@vindex wl-folder-check-async
The initial setting is @code{t}.  If non-nil, check folder's unread
status asynchronously.  It boosts newsgroup checking.

@item wl-folder-check-fast
@vindex wl-folder-check-fast
The initial setting is @code{nil}.
If non-nil, it does not update folder status while checking.
@c it is obsolete?
@item wl-folder-notify-deleted
@vindex wl-folder-notify-deleted
The initial setting is @code{nil}.
@c  nil means?
If non-nil, negative value is displayed when the message is deleted.  If
@code{sync}, folder is synchronized when the message is deleted.  If
@code{nil}, message deletion is ignored.
@end table

@subsection Miscellanea

Following is a note for folder editing.

@enumerate
@item
cut or copy stacks the folder in the @code{wl-fldmgr-cut-entity-list}.
paste(yank) command pastes the folders on one cut or copy command
(If copy command is executed by region, folders in the region are pasted
by one paste command)

@item
You cannot cut @samp{Desktop} group.
Also, you cannot paste folders at the outside of the @samp{Desktop}.

@item
You cannot copy folder group.

@item
Operations on the access group are only available for the folders
in the same access group.

@item
You cannot create a folder which has same name with the folders already exist.

@item
You cannot insert folders which have same name in one group.
You can insert them in the different groups.
You cannot put same nickname to the different folders.
@end enumerate


@node Summary, Message, Folder, Top
@chapter Summary Mode

After you select the folder via folder mode, you enter to the summary
mode.

@menu
* Usage of Summary Mode::       TIPS.
* Thread Operations::           Thread operations.
* Cache::                       File cache, Buffer cache, and Prefetch.
* Auto Refile::                 Auto refile settings.
* Sticky Summary::              Summary make sticky.
* Key Bindings of Summary::     Key bindings.
* Variables of Summary::        Customize Summary Mode.
@end menu


@node Usage of Summary Mode, Thread Operations, Summary, Summary
@section Usage (Tips)

@subsection Summary Content

In the summary mode, messages are displayed like following.

@example
@group
  377  09/16(Wed)11:57 [+1: Takuro Kitame  ] Bug?
  381  09/17(Thu)00:16 [+3: Fujikazu Okuni ] elmo-lha.el -- LHA interface
  384  09/17(Thu)01:32 [+1: Yuuichi Terani ] wl-0.6.2
  389 N09/18(Fri)01:07 [+2: Yuuichi Terani ] wl-0.6.3
@end group
@end example

Each line displays:

@example
@var{Message number}, @var{Temporal mark}, @var{Persistent mark}, @var{Date}, @var{Sender}, @var{Subject}
@end example

@noindent
You cannot change this in the current version.

@var{Message number} is the message's unique number in the folder. In
the NNTP folder, it is article number, in the IMAP folder, it is UID and
in the MH folder, it is the filename of the message.

@var{Temporal mark} and @var{Persistent mark} are described later.

@var{Date} is displayed like @samp{@var{Month}/@var{Day}(@var{Week
Day})@var{Hour}:@var{Minute}}.  Default setting displays week day in
Japanese, but if you want to display it in English, set the value of
@code{wl-summary-weekday-name-lang} as @samp{en}.

@var{Sender}'s indentation corresponds to the depth of the thread.
Sender name is displayed as nickname if it is defined in the address
book.  Set @code{wl-use-petname} as @samp{nil}, if you want to quit
displaying with nickname.

If number is printed at the head of @var{Sender} part like @samp{+2},
that means the message have 2 follow messages.

@var{Subject} is the @samp{Subject:} header field of the message.  If
the message have same @samp{Subject:} with the parent message, it is not
displayed.  Some mailing list puts its sequence number in the
@samp{Subject:} field, but it is
ignored. @code{wl-summary-no-subject-message} is displayed when the
message has empty subject field.

@subsection Temporary Marks
@cindex Mark, Temporary

There are four temporary marks, 
@samp{*}, @samp{D}, @samp{o} and @samp{O}.
Temporary marks indicates message operations.

@table @samp
@item *
Target mark.
You can execute a command on the all messages that have @samp{*} mark,
with the key bindings which begins with @kbd{m}.

@item D
The mark to delete. You can put @samp{D} by typing @kbd{d} key.

@item o
The mark to refile.
After you type @kbd{o} key, prompt appears to input refile destination.
Your answer is printed in the summary line.

@item O
The mark to refile.
You can put this mark by typing @kbd{O} key.
The difference between this mark and refile mark is, 
this mark does not delete the message while latter does.
@end table

@kbd{x} key executes @samp{D}, @samp{o} and @samp{O} marks.

@subsection Persistent Marks

There are five persistent marks,
@samp{N}, @samp{U}, @samp{!}, @samp{u} and @samp{$}.

The persistent mark indicates the message's status and it is saved.
Each persistent mark indicates:

@table @samp
@item N
It is new message.
@item U
It is unread message.
@item !
It is unread but cached message.
@item u
It is read but it is not cached.
@item $
It is important message.  You can put @samp{$} mark by typing @kbd{$}
key (if already exists, the mark is deleted).  It is convenient to put
this mark on the messages to remember (If you want to remember to write
a reply for the message, for example) because this mark remains after
you exited Emacs.  Messages with the @samp{$} mark remains in the folder
even the message itself is deleted in the actual folder.

@item None
If the message is read and cached (or local message),there are no
persistent mark.
@end table

@samp{N}, @samp{U} and @samp{u} indicates that the message have no
cache.  Messages with the marks other than these, you can read them in
the offline status even they are in the IMAP folder or netnews folder.

@subsection How To Read

Basically, you can read messages only typing space key again and again.

To update summary status to the newest status (synchronize),
type @kbd{s} key.

You can jump to next unread message by typing @kbd{N} key, and @kbd{n} key
moves cursor to the next message.
Enter message buffer by typing @kbd{j} key.
To operate multipart, you have to enter to the message buffer.
@xref{Message}.

@subsection Pack the Message Numbers
You can pack the message numbers in Summary by 
@kbd{M-x wl-summary-pack-number}. Note that only MH Folder, 
News Spool Folder and Maildir Folder are supported folder types.


@node Thread Operations, Cache, Usage of Summary Mode, Summary
@section Thread Operations

For example, the following line indicates one thread (a context of a topic).

@example
  384  09/17(Thu)01:32 [+1: Teranishi       ] wl-0.6.2
@end example

@noindent
If you type @kbd{/} on this line, the thread is opened and it changes
the appearance like following.

@example
@group
  384  09/17(Thu)01:32 [ Teranishi          ] wl-0.6.2
  388  09/17(Thu)22:34 +-[ Murata san         ]
@end group
@end example

(Message 388 is the replied message to the message 384.)
If you type @kbd{/} key once again, the thread is closed.
With prefix argument, @kbd{/} opens all children threads.

Commands with the key binding that begins with @kbd{t} executes commands
on the messages in the thread.

@subsection reconstruct thread by hand

You can reconstruct the thread manually.  In Summary, @kbd{M-w}
(@code{wl-summary-save-current-message}) at the corresponding message,
and @kbd{C-y} (@code{wl-summary-yank-saved-message}) at the new parent
message then you have the reconstructed thread.


@node Cache, Auto Refile, Thread Operations, Summary
@section Cache

@subsection Cache File

The messages which have to access via network (e.x. IMAP, NNTP folder)
are cached as a local file.  The cache file is saved under the directory
@file{~/.elmo/cache}.  To expire cache, type @kbd{M-x
elmo-cache-expire-by-size}.  The command deletes cache files to the
specified size by the order of last accessed time.

@subsection Buffer Cache and Prefetching

If the value of @code{elmo-use-buffer-cache} is non-nil, the messages
that are read are kept in the cache buffer.  It is called `buffer
cache'. The number of cache buffer is specified by
@code{elmo-buffer-cache-size}.

There are message prefetching mechanism in the Wanderlust that
prefetches next message while you are reading.  This function requires
that the value of @code{elmo-use-buffer-cache} is non-nil.

You can control the message prefetching mechanism by these two
variables.

@table @code
@item wl-cache-prefetch-folder-type-list
@vindex wl-cache-prefetch-folder-type-list
The initial setting is the list shown below:
@lisp
@group
(nntp imap4)
@end group
@end lisp

@noindent
It specifies the folder types in which message prefetching is enabled.
In the initial setting, multi folder that contains localdir and imap4
prefetches only imap4 messages.  This variable precedes the value of
@code{wl-cache-prefetch-folder-list}.

If you want to prefetch localdir and localnews also, following setting
is needed.

@lisp
@group
(setq wl-cache-prefetch-folder-type-list
      '(nntp imap4 localdir localnews))
@end group
@end lisp

@item wl-cache-prefetch-folder-list
@vindex wl-cache-prefetch-folder-list
The initial setting is @code{nil}.
A list of regexp of folders to enable message prefetching.
@end table


@node Auto Refile, Sticky Summary, Cache, Summary
@section Auto Refile
@vindex elmo-msgdb-extra-fields
@vindex wl-refile-rule-alist
@findex wl-summary-auto-refile

You can refile messages automatically, by typing @kbd{C-o}
(@code{wl-summary-auto-refile}). It decides destination of refile by
the content of the message header information (information in the msgdb).

By default, @samp{From:}, @samp{Subject:}, @samp{To:} and @samp{Cc:} is
available.  If you want to decide destination by other header fields,
set the variable @code{elmo-msgdb-extra-fields} like following.

@lisp
@group
(setq elmo-msgdb-extra-fields
      '("x-ml-name"
        "reply-to"
        "sender"
        "mailing-list"
        "newsgroups"))
@end group
@end lisp

@noindent
By this setting, Wanderlust saves extra fields in the msgdb.  You have
to type @kbd{s all} to get extra fields for the messages that are
already exists in the summary.

Then, specify the refile rule.  The refile target folder of auto
refiling is decided by the value of @code{wl-refile-rule-alist}.
@code{wl-refile-rule-alist} is a list of a rule:

@example
@group
(@var{field} (@var{regexp} . @var{target})
       (@var{regexp} . @var{target})
       @dots{})
@end group
@end example

Each rule means `if @var{field} value matches @var{regexp},
then refile to @var{target} folder'.
The rule matched first is applied.

@var{field} is a string of field name.  You can specify a list of field name
string, too. In this case, if one of these fields is matched, then the
rule is fired (i.e. OR condition).

@var{regexp} is a regular expression for field value.  @var{target} is a target
folder string. You can specify a rule at @var{target} part, too.  In this
case, If the field value of the rule and the current rule is matched,
then the current rule is fired (i.e. AND condition).

In @var{target} part, you can refer matched substring of @var{regexp}.
To refer substring, specify following in @var{target}:

@table @samp
@item \&
means substitute original matched text.

@item \@var{N}
means substitute what matched the @var{N}th `\(@dots{}\)'.
(@var{N} is a number.)
@end table

Following is an example of @code{wl-refile-rule-alist}.

@lisp
@group
(setq wl-refile-rule-alist
      '(("x-ml-name"
         ("^Wanderlust" . "+wl")
         ("^Elisp" . "+elisp"))
        (("To" "Cc")
         ("\\([a-z]+\\)@@gohome.org" . "+\\1"))
        ("From"
         ("me@@gohome.org" . ("To" ("you@@gohome.org" . 
                                    "+from-me-to-you"))))))
@end group
@end lisp

After these settings, refile marks are automatically put on the condition
matched messages by typing @kbd{C-o} (@code{wl-summary-auto-refile}).

Messages which have @code{wl-summary-auto-refile-skip-marks} is skipped
auto refiling. 
By default, @samp{N}, @samp{U} and @samp{!} is specified, so the messages
with these persistent marks are not automatically refiled.
It means Wanderlust does not execute auto refile on unread messages by
the default setting.
To execute auto refile on all messages, set following.

@lisp
(setq wl-summary-auto-refile-skip-marks nil)
@end lisp


@node Sticky Summary, Key Bindings of Summary, Auto Refile, Summary
@section Sticky Summary
@cindex Summary, Sticky
@cindex Sticky Summary

The buffer of the `sticky summary' does not killed by typing @kbd{q}. 

Sticky buffer is created by entering the summary by typing @kbd{C-u g}
or type @kbd{M-s} (@code{wl-summary-stick}) on the normal summary.

The buffer name of the sticky summary becomes like
@samp{Summary:@var{folder-name}}.

You can visit the sticky summary at any time by @kbd{C-x b}
(@code{switch-to-buffer}).  To exit sticky summary, type @kbd{C-u
q}. Other operations in the sticky summary are same as normal summary.

@code{wl-summary-always-sticky-folder-list} specifies the folders that
are automatically sticked.


@node Key Bindings of Summary, Variables of Summary, Sticky Summary, Summary
@section Key bindings
@cindex Keybind, Summary Mode
@cindex Keybind, Summary Buffer

Key bindings of the summary mode are shown below.

@table @kbd
@item @key{SPC}
@kindex @key{SPC} (Summary)
@findex wl-summary-read
Proceed reading a message at the current cursor point.
(@code{wl-summary-read})

@item .
@kindex . (Summary)
@findex wl-summary-redisplay
Redisplay a message at the current cursor point.
If this command is called with prefix argument, 
Redisplay message regardless of the message cache (message is re-loaded
from source). 
(@code{wl-summary-redisplay})

@item <
@kindex < (Summary)
@findex wl-summary-display-top
Display the top message in the folder.
(@code{wl-summary-display-top})

@item >
@kindex > (Summary)
@findex wl-summary-display-bottom
Display the bottom message in the folder.
(@code{wl-summary-display-bottom})

@item @key{BS}
@itemx @key{DEL}
@kindex @key{BS} (Summary)
@kindex @key{DEL} (Summary)
Display the previous page of the message at the current cursor point.
@findex wl-summary-prev-page
(@code{wl-summary-prev-page})

@item @key{RET}
@kindex @key{RET} (Summary)
@findex wl-summary-next-line-content
Display the next line of the message at the current cursor point.
Display the message at the current cursor point if it is not displayed yet.
(@code{wl-summary-next-line-content})

@item -
@itemx M-@key{RET}
@kindex - (Summary)
@kindex M-@key{RET} (Summary)
@findex wl-summary-prev-line-content
Display the previous line of the message at the current cursor point.
Display the message at the current cursor point if it is not displayed yet.
(@code{wl-summary-prev-line-content})

@item /
@kindex / (Summary)
@findex wl-thread-open-close
Toggle open or close the thread at the current cursor point.
(@code{wl-thread-open-close})

@item [
@kindex [ (Summary)
Open all threads.
@findex wl-thread-open-all
(@code{wl-thread-open-all})

@item ]
@kindex ] (Summary)
Close all threads.
@findex wl-thread-close-all
(@code{wl-thread-close-all})

@item g
@kindex g (Summary)
@findex wl-summary-goto-folder
Go to other folder.
(@code{wl-summary-goto-folder})

@item c
@kindex c (Summary)
Mark all messages in the folder as read.
@findex wl-summary-mark-as-read-all
(@code{wl-summary-mark-as-read-all})

@item a
@kindex a (Summary)
@findex wl-summary-reply
Prepare a draft for reply the message at the current cursor point.
(@code{wl-summary-reply})

@item A
@kindex A (Summary)
@findex wl-summary-reply-with-citation
Prepare a draft for reply the message at the current cursor point.
(@code{wl-summary-reply-with-citation})

@item C
@kindex C (Summary)
@findex wl-summary-cancel-message
If the message at current cursor point is your own netnews article,
cancel it.
(@code{wl-summary-cancel-message})

@item E
@kindex E (Summary)
@findex wl-summary-reedit
Prepare a draft for re-editing the message at current cursor point.
If the message at current cursor point is your own netnews article,
a draft for `supersedes message' for the message is prepared.
(@code{wl-summary-reedit})

@item M-e
@kindex M-e (Summary)
@findex wl-summary-resend-bounced-mail
If the message at current cursor point is a bounced message,
a draft for re-sending original message is prepared.
(@code{wl-summary-resend-bounced-mail})

@item f
@kindex f (Summary)
@findex wl-summary-forward
A draft for forwarding the message at current cursor point is prepared.
(@code{wl-summary-forward})

@item $
@kindex $ (Summary)
@findex wl-summary-mark-as-important
Put @samp{$} mark on the message at current cursor point.
If already marked as @samp{$}, delete it.
(@code{wl-summary-mark-as-important})

@item y
@itemx e
@kindex y (Summary)
@kindex e (Summary)
Save the message at current cursor point.
@findex wl-summary-save
(@code{wl-summary-save})

@item n
@kindex n (Summary)
@findex wl-summary-next
Move cursor to the next message.
If message is marked with a temporal mark in 
@code{wl-summary-skip-mark-list}, cursor is not moved to it.
In the offline mode, cursor is not moved to the messages which are not cached
yet.
(@code{wl-summary-next})

@item p
@kindex p (Summary)
@findex wl-summary-prev
Move cursor to the previous message.
If message is marked with a temporal mark in 
@code{wl-summary-skip-mark-list}, cursor is not moved to it.
In the offline mode, cursor is not moved to the messages which are not cached
yet.
(@code{wl-summary-prev})

@item N
@kindex N (Summary)
@findex wl-summary-down
Move cursor to the downward message which is unread or marked
as @samp{$}.
(@code{wl-summary-down})

@item P
@kindex P (Summary)
@findex wl-summary-up
Move cursor to the upward message which is unread or marked
as @samp{$}.
(@code{wl-summary-up})

@item w
@kindex w (Summary)
@findex wl-summary-write
Prepare a new draft.
(@code{wl-summary-write})

@item W
@kindex W (Summary)
@findex wl-summary-write-current-folder
Prepare a new draft.  If the current folder is NNTP folder,
@samp{Newsgroups:} field is completed.  If the current folder is mailing
list folder (refile destination), guess @samp{To:} field and completed
(If @code{wl-subscribed-mailing-list} is valid list)
(@code{wl-summary-write-current-folder})

@item H
@kindex H (Summary)
@findex wl-summary-redisplay-all-header
Redisplay the message at current cursor point with all header fields.
(@code{wl-summary-redisplay-all-header})

@item M
@kindex M (Summary)
@findex wl-summary-redisplay-no-mime
Redisplay the message at current cursor point without MIME analysis.
(@code{wl-summary-redisplay-no-mime})

@item B
@kindex B (Summary)
@findex wl-summary-burst
If the message at current cursor point has 
encapsulates multiple messages using MIME,
de-capsulate and extract them on the current folder.
(@code{wl-summary-burst})

@item @@
@kindex @@ (Summary)
@findex wl-summary-edit-addresses
Append/change/delete the message's sender information to the address
book @file{~/.addresses} interactively.  If this command is called with
prefix argument, arbitrary address can be edited.
(@code{wl-summary-edit-petname})

@item Z
@kindex Z (Summary)
@findex wl-status-update
Sync up address book status with @file{~/.addresses}'s content.
(@code{wl-status-update})

@item |
@kindex | (Summary)
@findex wl-summary-pipe-message
Pipe current message's content to the external process.
(@code{wl-summary-pipe-message})

@item #
@kindex # (Summary)
@findex wl-summary-print-message
Print out current message's content.
It uses @code{ps-print} module in Emacs 20.x.
If you don't use color printer, you might want to set
@code{wl-ps-print-buffer-func} to @code{ps-print-buffer}.

@lisp
(setq wl-ps-print-buffer-func 'ps-print-buffer)
@end lisp

(@code{wl-summary-print-message})

@item q
@kindex q (Summary)
@findex wl-summary-exit
Exit current folder.
(@code{wl-summary-exit})

@item j
@kindex j (Summary)
@findex wl-summary-jump-to-current-message
Jump cursor to the currently displayed message's window.
(@code{wl-summary-jump-to-current-message})

@item J
@kindex J (Summary)
Jump cursor to the other message.
@findex wl-summary-jump-to-msg
(@code{wl-summary-jump-to-msg})

@item I
@kindex I (Summary)
Update summary status and
prefetch all messages which have marks included in the 
@code{wl-summary-incorporate-marks}.
@findex wl-summary-incorporate
(@code{wl-summary-incorporate})

@item M-j
@kindex M-j (Summary)
@findex wl-summary-jump-to-msg-by-message-id
Jump cursor to the message which have specified @samp{Message-Id:}.  If
@code{elmo-use-database} is non-nil, other folder is also searched.
(@code{wl-summary-jump-to-msg-by-message-id})

@item ^
@kindex ^ (Summary)
Jump to parent message.
@findex wl-summary-jump-to-parent-message
(@code{wl-summary-jump-to-parent-message})

@item !
@kindex ! (Summary)
@findex wl-summary-mark-as-unread
Mark as unread the message at current cursor point.
(@code{wl-summary-mark-as-unread})

@item s
@kindex s (Summary)
@findex wl-summary-sync
Synchronize summary view after prompting the update range
(@samp{all}, @samp{update}, @samp{rescan}, @samp{first}, @samp{last}).

@example
@group
all            ...Discard current summary and update all message.
update         ...Update the difference between summary and the folder itself.
rescan         ...Rescan the msgdb and display again.
rescan-noscore ...Rescan the msgdb and display again (without scoring).
first, last    ...Move to the filter folder(partial filter).
@end group
@end example

@noindent
(@code{wl-summary-sync})

@item S
@kindex S (Summary)
@findex wl-summary-sort
Sort summary order.
You can sort by @samp{date}, @samp{from}, @samp{number} and @samp{subject}.
(@code{wl-summary-sort})

@item T
@kindex T (Summary)
@findex wl-summary-toggle-thread
Toggle the threading.
Threading status is displayed on the modeline.
@samp{@{S@}} means threading is off (Sequence) and 
@samp{@{T@}} means threading is on (Thread).
(@code{wl-summary-toggle-thread})

@item l
@kindex l (Summary)
@findex wl-summary-toggle-disp-folder
Toggle displaying of folder window.
(@code{wl-summary-toggle-disp-folder})

@item v
@kindex v (Summary)
Toggle displaying of message window.
@findex wl-summary-toggle-disp-msg
(@code{wl-summary-toggle-disp-msg})

@item V
@kindex V (Summary)
Move to the virtual folder with the condition specified.
If called with prefix argument and current folder is virtual, exit it.
@findex wl-summary-virtual
(@code{wl-summary-virtual})

@item @key{TAB}
@kindex @key{TAB} (Summary)
@findex wl-summary-goto-last-displayed-msg
Jump to the message which is displayed last.
(@code{wl-summary-goto-last-displayed-msg})

@item ?
@kindex ? (Summary)
Put @samp{*} mark on the messages that satisfies the specified condition.
@findex wl-summary-pick
(@code{wl-summary-pick})

@item R
@kindex R (Summary)
@findex wl-summary-mark-as-read
Mark as read the message at the current cursor point.
(@code{wl-summary-mark-as-read})

@item i
@kindex i (Summary)
Prefetch the message at the current cursor point.
With prefix argument, prefetch the message even if it is cached.
@findex wl-summary-prefetch
(@code{wl-summary-prefetch})

@item x
@kindex x (Summary)
Execute @samp{D}, @samp{o} and @samp{O} marks.
@findex wl-summary-exec
(@code{wl-summary-exec})

@item *
@kindex * (Summary)
@findex wl-summary-target-mark-line
Put target mark on the message at the current cursor point.
(@code{wl-summary-target-mark-line})

@item o
@kindex o (Summary)
Put refile mark on the message at the current cursor point.
@findex wl-summary-refile
(@code{wl-summary-refile})

@item C-o
@kindex C-o (Summary)
Execute auto refile.
@findex wl-summary-auto-refile
(@code{wl-summary-auto-refile})

@item O
@kindex O (Summary)
Put copy mark on the message at the current cursor point.
@findex wl-summary-copy
(@code{wl-summary-copy})

@item M-o
@kindex M-o (Summary)
Put refile mark on the message at the current cursor point with the destination
previously specified.
@findex wl-summary-refile-prev-destination
(@code{wl-summary-refile-prev-destination})

@item d
@kindex d (Summary)
@findex wl-summary-delete
Put delete mark on the message at the current cursor point.
(@code{wl-summary-delete})

@item u
@kindex u (Summary)
@findex wl-summary-unmark
Unmark the temporal mark on the message at the current cursor point.
(@code{wl-summary-unmark})

@item U
@kindex U (Summary)
Unmark all the temporal marks.
@findex wl-summary-unmark-all
(@code{wl-summary-unmark-all})

@item r R
@kindex r R (Summary)
@findex wl-summary-mark-as-read-region
Mark as read messages in the specified region.
(@code{wl-summary-mark-as-read-region})

@item r $
@kindex r $ (Summary)
@findex wl-summary-mark-as-important-region
Mark as important @samp{$} messages in the specified region.
If @samp{$} already exists, it is deleted.
(@code{wl-summary-mark-as-important-region})

@item r !
@kindex r ! (Summary)
@findex wl-summary-mark-as-unread-region
Mark as unread messages in the specified region.
(@code{wl-summary-mark-as-unread-region})

@item r i
@kindex r i (Summary)
@findex wl-summary-prefetch-region
Prefetch messages in the specified region.
(@code{wl-summary-prefetch-region})

@item r x
@kindex r x (Summary)
@findex wl-summary-exec-region
Execute @samp{D}, @samp{o} and @samp{O} marks on the messages in the
specified region.
(@code{wl-summary-exec-region})

@item r *
@kindex r * (Summary)
@findex wl-summary-target-mark-region
Put target mark on the messages in the specified region.
(@code{wl-summary-target-mark-region})

@item r o
@kindex r o (Summary)
@findex wl-summary-refile-region
Put refile mark on the messages in the specified region.
(@code{wl-summary-refile-region})

@item r O
@kindex r O (Summary)
@findex wl-summary-copy-region
Put copy mark on the messages in the specified region.
(@code{wl-summary-copy-region})

@item r d
@kindex r d (Summary)
@findex wl-summary-delete-region
Put delete mark on the messages in the specified region.
(@code{wl-summary-delete-region})

@item r u
@kindex r u (Summary)
@findex wl-summary-unmark-region
Delete temporal mark on the messages in the specified region.
(@code{wl-summary-unmark-region})

@item r y
@kindex r y (Summary)
Save messages in the specified region.
@findex wl-summary-save-region
(@code{wl-summary-save-region})

@item t R
@kindex t R (Summary)
@findex wl-thread-mark-as-read
Mark as read messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-mark-as-read})

@item t $
@kindex t $ (Summary)
@findex wl-thread-mark-as-important
Put important mark @samp{$} on the messages which are the 
descendant of the current thread.
If @samp{$} mark exists, it is deleted.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-mark-as-important})

@item t !
@kindex t ! (Summary)
@findex wl-thread-mark-as-unread
Mark as unread messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-mark-as-unread})

@item t i
@kindex t i (Summary)
@findex wl-thread-prefetch
Prefetch messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-prefetch})

@item t x
@kindex t x (Summary)
@findex wl-thread-exec
Execute @samp{D}, @samp{o} and @samp{O} marks on the messages which are
the descendant of the current thread.  With prefix argument, it affects
on the all messages in the thread tree.
(@code{wl-thread-exec})

@item t *
@kindex t * (Summary)
@findex wl-thread-target-mark
Put target mark @samp{*} on the messages which are the descendant of the
current thread.  With prefix argument, it affects on the all messages in
the thread tree.
(@code{wl-thread-target-mark})

@item t o
@kindex t o (Summary)
@findex wl-thread-refile
Put refile mark on the messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-refile})

@item t O
@kindex t O (Summary)
@findex wl-thread-copy
Put copy mark on the messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-copy})

@item t d
@kindex t d (Summary)
@findex wl-thread-delete
Put delete mar on the messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-delete})

@item t u
@kindex t u (Summary)
@findex wl-thread-unmark
Unmark temporal mark on the messages which are the descendant of the
current thread. With prefix argument, it affects on the all messages in
the thread tree. 
(@code{wl-thread-unmark})

@item t y
@kindex t y (Summary)
@findex wl-thread-save
Save messages which are the descendant of the current thread.
With prefix argument, it affects on the all messages in the thread tree.
(@code{wl-thread-save})

@item m i
@kindex m i (Summary)
@findex wl-summary-target-mark-prefetch
Prefetch all messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-prefetch})

@item m R
@kindex m R (Summary)
@findex wl-summary-target-mark-mark-as-read
Mark as read all messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-mark-as-read})

@item m $
@kindex m $ (Summary)
@findex wl-summary-target-mark-mark-as-important
Mark as important all messages which have target mark @samp{*}.
If already marked as @samp{$}, it is deleted.
(@code{wl-summary-target-mark-mark-as-important})

@item m !
@kindex m ! (Summary)
@findex wl-summary-target-mark-mark-as-unread
Mark as unread all messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-mark-as-unread})

@item m o
@kindex m o (Summary)
@findex wl-summary-target-mark-refile
Put refile mark on the messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-refile})

@item m O
@kindex m O (Summary)
@findex wl-summary-target-mark-copy
Put copy mark on the messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-copy})

@item m d
@kindex m d (Summary)
@findex wl-summary-target-mark-delete
Put delete mark on the messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-delete})

@item m y
@kindex m y (Summary)
@findex wl-summary-target-mark-save
Save messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-save})

@item m u
@kindex m u (Summary)
Unmark all temporal marks.
(@code{wl-summary-delete-all-temp-marks})
@findex wl-summary-delete-all-temp-marks

@item m a
@kindex m a (Summary)
Put target mark @samp{*} on the all messages.
(@code{wl-summary-target-mark-all})
@findex wl-summary-target-mark-all

@item m t
@kindex m t (Summary)
Put target mark @samp{*} on the messages in the current thread.
@findex wl-summary-target-mark-thread
(@code{wl-summary-target-mark-thread})

@item m r
@kindex m r (Summary)
@findex wl-summary-target-mark-region
Put target mark @samp{*} on the messages in the specified region.
(@code{wl-summary-target-mark-region})

@item m A
@kindex m A (Summary)
@findex wl-summary-target-mark-reply-with-citation
Prepare a draft which cites all messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-reply-with-citation})

@item m f
@kindex m f (Summary)
@findex wl-summary-target-mark-forward
Prepare a draft which forwards all messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-forward})

@item m U
@kindex m U (Summary)
@findex wl-summary-target-mark-uudecode
Uudecode the messages which have target mark @samp{*}.
(@code{wl-summary-target-mark-uudecode})

@item m ?
@kindex m ? (Summary)
@findex wl-summary-target-mark-pick
Pick messages from the @samp{*} marked messages. 
That is, @samp{*} marks on the messages are remained
if the specified condition is satisfied.
(@code{wl-summary-target-mark-pick})

@item M-t
@kindex M-t (Summary)
@findex wl-toggle-plugged
Toggle offline/online status of Wanderlust.
(@code{wl-toggle-plugged})

@item C-t
@kindex C-t (Summary)
Start Wanderlust's plug-status manager.
(@code{wl-plugged-change})

@item C-c C-o
@kindex C-c C-o (Summary)
@findex wl-jump-to-draft-buffer
Move to the draft buffer if available.  If multiple draft buffer exists,
moved to one after another.  If prefix argument is specified, load draft
folder's message to the draft buffer and jump to it.
(@code{wl-jump-to-draft-buffer})

@item M-w
@kindex M-w (Summary)
@findex wl-summary-save-current-message
Save the message at the current cursor point.
(@code{wl-summary-save-current-message})

@item C-y
@kindex C-y (Summary)
@findex wl-summary-yank-saved-message
Regard the message at the current cursor point as
parent, connect the message saved by
@code{wl-summary-save-current-message}
to the thread.
(@code{wl-summary-yank-saved-message})
@end table


@node Variables of Summary,  , Key Bindings of Summary, Summary
@section Customiziable variables

@table @code
@item wl-summary-move-order
@vindex wl-summary-move-order
The initial setting is @code{unread}.  Specify cursor moving policy.  If
you want to precede new messages, set @code{new}.  If you want to
precede unread messages, set @code{unread}.  If @code{nil}, proceed to
next message.

@item wl-auto-select-first
@vindex wl-auto-select-first
The initial setting is @code{nil}.
If non-nil, first message is automatically displayed.

@item wl-auto-select-next
@vindex wl-auto-select-next
The initial setting is @code{nil}.  If non-nil, jump to next summary
automatically.  If @code{unread}, jump to next unread folder's summary
after confirmation.  If @code{skip-no-unread}, unread folders are
automatically skipped.

@item wl-thread-insert-opened
@vindex wl-thread-insert-opened
The initial setting is @code{nil}.
If non-nil, thread is inserted as opened.

@item wl-thread-open-reading-thread
@vindex wl-thread-open-reading-thread
The initial setting is @code{t}.  If non-nil, reading thread is
automatically opened though it is closed thread.

@item wl-summary-exit-next-move
@vindex wl-summary-exit-next-move
The initial setting is @code{t}.  If non-nil, move to next folder at
summary exit.

@item wl-folder-move-cur-folder
@vindex wl-folder-move-cur-folder
The initial setting is @code{nil}.  If non-nil, cursor position on the
folder is moved.

@item wl-summary-weekday-name-lang
@vindex  wl-summary-weekday-name-lang
The initial setting is @samp{ja}.  Specify language of the weekday.
@samp{en} displays English, @samp{fr} displays French, @samp{de}
displays Deutsch.

@item wl-summary-fix-timezone
@vindex  wl-summary-fix-timezone
The initial setting is @samp{JST}.  Timezone to adjust summary's
timezone.  If @code{nil}, adjust to GMT.

@item wl-use-petname
@vindex  wl-use-petname
The initial setting is @code{t}.
If non-nil, sender part displays nickname.

@item wl-break-pages
@vindex  wl-break-pages
The initial setting is @code{t}.
If non-nil, message is splitted as pages by @samp{^L}.

@item wl-message-window-size
@vindex  wl-message-window-size
The initial setting is '(1 . 4).
A cons cell to specify the rate of summary and message window.
car:cdr corresponds summary:message.

@item wl-summary-recenter
@vindex  wl-summary-recenter
The initial setting is t.
If non-nil, cursor point is moved to the center of the summary window.

@item wl-summary-indent-length-limit
@vindex  wl-summary-indent-length-limit
The initial setting is 46.
Specify the limit of thread indent level.
If nil, max indent level is unlimited.

@item wl-summary-no-from-message
@vindex  wl-summary-no-from-message
The initial setting is @samp{nobody@@nowhere?}.  A string which is
displayed when there's no @samp{From:} field in the message.

@item wl-summary-no-subject-message
@vindex  wl-summary-no-subject-message
The initial setting is @samp{(WL:No Subject in original.)}.  A string
which is displayed when there's no @samp{Subject:} field in the message.

@item wl-summary-width
@vindex  wl-summary-width
The initial setting is 80.
Width of summary line. If @code{nil}, summary line's width is as is.

@item wl-use-folder-petname
@vindex  wl-use-folder-petname
The initial setting is the list shown below:

@lisp
@group
(modeline)
@end group
@end lisp

@noindent
A list of display policy (symbol) of folder nickname.  Available symbols
are:

@table @code
@item modeline
Display folder petname on modeline.
@item ask-folder
Destination folder is notified as nickname if
@code{wl-auto-select-next} is non-nil.
@item read-folder
You can input folder name by nickname in the function
@code{wl-summary-read-folder}.
@end table

@item wl-summary-move-direction-toggle
@vindex  wl-summary-move-direction-toggle
The initial setting is @code{t}.  If non-nil, last executed @kbd{p},
@kbd{P}, @kbd{n}, @kbd{N} toggles the direction of cursor move.  If you
want to aware of reading direction, set this to @code{t}.

@item wl-from-width
@vindex wl-from-width
The initial setting is 17.
Width of sender part of summary line.

@item wl-summary-divide-thread-when-subject-changed
@vindex wl-summary-divide-thread-when-subject-changed
The initial setting is @code{nil}.  If non-nil, thread is splitted if
the subject is changed.

@item wl-summary-search-via-nntp
@vindex wl-summary-search-via-nntp
The initial setting is @code{confirm}.

If non-nil and @code{wl-summary-jump-to-msg-by-message-id} failed, call
@code{wl-summary-jump-to-msg-by-message-id-via-nntp} and search message
from the NNTP server @code{elmo-default-nntp-server}.  The value of
@code{elmo-default-nntp-user}, @code{elmo-default-nntp-port},
@code{elmo-default-nntp-stream-type} are used.

If @code{confirm}, server name can be specified. You can specify NNTP
folder format like @samp{-:username@@servername:119!}.

@item wl-summary-keep-cursor-command
@vindex wl-summary-keep-cursor-command
The initial setting is the list shown below:

@lisp
@group
(wl-summary-goto-folder wl-summary-goto-last-visited-folder)
@end group
@end lisp

@noindent
When you entered to summary by these commands and the target summary
buffer already exists, summary status is not automatically updated and
cursor position is saved.

@item wl-summary-update-confirm-threshold
@vindex wl-summary-update-confirm-threshold
The initial setting is 500.  If updated message number is larger than
this value, confirm whether drop them or not.

@item wl-summary-always-sticky-folder-list
@vindex wl-summary-always-sticky-folder-list
The initial setting is @code{nil}.
@code{wl-summary-always-sticky-folder-list} specifies the folders that
are automatically sticked. Each element is regexp of folder name.

@item wl-summary-reserve-mark-list
@vindex wl-summary-reserve-mark-list
The initial setting is the list shown below:

@lisp
@group
("o" "O" "D")
@end group
@end lisp

@noindent
If a message is already marked as temporal marks in this list, the
message is not marked by any mark command.

@item wl-summary-skip-mark-list
@vindex wl-summary-skip-mark-list
The initial setting is the list shown below:

@lisp
@group
("D")
@end group
@end lisp

@noindent
If a message is already marked as temporal marks in this list, the
message is skipped at cursor move.

@item wl-fetch-confirm-threshold
@vindex wl-fetch-confirm-threshold
The initial setting is 30000 (bytes).  If displaying message has larger
size than this value, Wanderlust confirms whether fetch the message or
not.  If @code{nil}, the message is fetched without confirmation.

@item wl-prefetch-threshold
@vindex wl-prefetch-threshold
The initial setting is 30000 (bytes). If prefetching message has larger
size than this value and @code{wl-prefetch-confirm} is non-nil,
Wanderlust confirms whether prefetch the message or not.  If
@code{wl-prefetch-threshold} is @code{nil}, the message is prefetched
without confirmation.

@item wl-prefetch-confirm
@vindex wl-prefetch-confirm
The initial setting is @code{t}. If non-nil, Wanderlust confirms whether
prefetch the message or not if the message has larger size than
@code{wl-prefetch-threshold}.

@item wl-cache-fetch-threshold
@vindex wl-cache-fetch-threshold
The initial setting is 30000 (bytes).  The messages which have larger
size than @code{wl-fetch-confirm-threshold} are skipped buffer caching
mechanism. If @code{nil}, any messages are prefetched by buffer caching
mechanism.

@item elmo-imap4-use-cache
@vindex elmo-imap4-use-cache
The initial setting is @code{t}.  If non-nil, messages read via IMAP4
are cached.

@item elmo-nntp-use-cache
@vindex elmo-nntp-use-cache
The initial setting is @code{t}.  If non-nil, messages read via NNTP are
cached.

@item elmo-pop3-use-cache
@vindex elmo-pop3-use-cache
The initial setting is @code{t}.  If non-nil, messages read via POP3 are
cached.
@end table


@node Message, Draft, Summary, Top
@chapter Message Buffer

Message Buffers utilize MIME-View mode of SEMI/tm.  For operational
procedures and key bindings, refer to respective documents.
@xref{MIME-View, , ,mime-ui-en, a MIME user interface for GNU Emacs}.

@kbd{p} at the top of a message or @kbd{n} at the bottom of a message
brings you back to Summary mode.  @kbd{l} toggles display of Summary
mode buffer.

@section Key Bindings

@table @kbd

@item l
@kindex l (Message)
@findex wl-message-toggle-disp-summary
Toggles display of Summary mode buffer.
(@code{wl-message-toggle-disp-summary})

@item Button-2
@findex wl-message-refer-article-or-url
@kindex Button-2 (Message)
Assumes @samp{Message-ID:} at the mouse pointer, and shows the
corresponding message if found.
(@code{wl-message-refer-article-or-url})

@item Button-4 (upward movement of a wheel)
@kindex Button-4 (Message)
@findex wl-message-wheel-down
Scrolls the message backwards.  When the top of the message is hit,
moves to the previous message.
(@code{wl-message-wheel-down})

@item Button-5 (downward movement of a wheel)
@kindex Button-5 (Message)
@findex wl-message-wheel-up
Scrolls the message forward.  When the bottom of the message is hit,
moves to the next message.
(@code{wl-message-wheel-up})
@end table

@section Customizable Variables

@table @code
@item wl-message-window-size
@vindex wl-message-window-size
Initial setting is @code{'(1 . 4)}.  It is a cons cell and the ratio of
its car and cdr value corresponds to the ratio of Summary and Message
windows.
@item wl-message-ignored-field-list
@vindex wl-message-ignored-field-list
(SEMI only) Initial setting is nil.
All fields that match this list will be hidden in message buffer.
Each elements are regexp of field-name.
If nil, the value of mime-view-ignored-field-list is used.
@item wl-message-visible-field-list
@vindex wl-message-visible-field-list
(SEMI only) Initial setting is nil.
All fields that match this list will be hidden in message buffer.
Each elements are regexp of field-name. This value precedes
wl-message-ignored-field-list.
If nil, the value of mime-view-visible-field-list is used.
@item wl-message-sort-field-list
@vindex wl-message-sort-field-list
(SEMI only) Initial setting is
'("Return-Path" "Received" "^To" "^Cc" "Newsgroups" "Subject" "^From").
Header fields in message buffer are orderd by this value.
Each elements are regexp of field-name.
@end table

@node Draft, Disconnected Operations, Message, Top
@chapter Draft Buffer

At Summary mode, pressing @kbd{w} and the like creates a new draft
buffer.  You can edit and send mail and news articles in this buffer.

@section Tips

Basically it is Emacs-standard mail mode.

@subsection Address Completion

Initially, the cursor is at the @samp{To:} field.  Fill in recipients
addresses.  @kbd{@key{TAB}} completes them.

If you want to submit a news article, add @samp{Newsgroups:} field by
yourself.  Field names can be completed by @kbd{@key{TAB}}.

If you save the draft buffer you are editing, it is appended to the
folder specified by @code{wl-draft-folder}.

Using @samp{FCC:} field, you can specify the folder to which a copy of
the message is saved when it is sent.

@subsection Editing Messages

Multi-part editing utilize MIME edit mode of SEMI/tm.  For procedures of
editing, refer to respective documents.
@xref{MIME-Edit, , ,mime-ui-en, a MIME user interface for GNU Emacs}.

@subsection Dynamic Modification of Messages
@vindex wl-draft-config-alist
@c @cindex Change Message
@c @cindex Message, Change Dynamic

You can set @code{wl-draft-config-alist} so that header and body of the
message will automatically modified depending on information of header
and others.

The initial setting of @code{wl-draft-config-alist} is @code{nil}.

In the example below, the header is modified when
@code{wl-draft-send-and-exit} or @code{wl-draft-send} is invoked.  You
can set @code{wl-interactive-send} to non-nil so as to confirm changes
before sending the message.

@lisp
@group
(setq wl-draft-config-alist
      '(((string-match "aaa.ne.jp$" (system-name))
         ;; @r{applied if the expression is non-nil}
         (wl-smtp-posting-server . "mailserver-B")
         (wl-nntp-posting-server . "newsserver-B")
         ;; @r{settings of temporary variables}
         )
        ("^To: .*user@@aaa.bbb.com"
         ;; @r{applied if it matches the header of the draft buffer}
         ("Organization" . (format "Go %s" my-webpage)))
                       ;; @r{you can write elisp expressions here (eval only)}
         (top . "Hello.\n")    ;; @r{inserted at the top of the body}
         (bottom . "\nBye.\n") ;; @r{inserted at the bottom of the body}
        ))
@end group
@end lisp

The format of @code{wl-draft-config-alist} is:

@example
@group
'(("@var{regexp of the header}" or @var{elisp expression}
  ("@var{Field}" . value(@var{elisp expression}))
   (@var{variable} . value(@var{elisp expression}))
   (@var{sub-function} . value(@var{elisp expression}))
   @var{function}
   @dots{})
  ("@var{regexp of the header}" or @var{elisp expression}
   ("@var{Field}" . value(@var{elisp expression}))
   @dots{}))
@end group
@end example

Per default, there are 10 following sub-functions.

@example
'header:      Inserts the specified string at the bottom of the header.
'header-file: Inserts the specified file at the bottom of the header.
'x-face:      Inserts @samp{X-Face:} field with the content of the specified file.
'top:         Inserts the specified string at the top of the body.
'top-file:    Inserts the specified file at the top of the body.
'body:        Replaces the body with the specified string.
              Specifying @code{nil} deletes the entire body string.
'body-file:   Replaces the body with the content of the specified file.
'bottom:      Inserts the specified string at the bottom of the body.
'bottom-file: Inserts the specified file at the top of the body.
'template:    Applies the specified template.
              (refer to the next subsection)
@end example

These are defined in @code{wl-draft-config-sub-func-alist} and you can
change them or add your own functions.  If you read the code, you can
easily find how to write the functions.

At the first of each item, @var{a regular expression of the header} or
an @var{elisp expression} should be specified.  In the case of an elisp
expression, the item is applied when the expression is evaluated
non-nil.

Per default, when multiple items match or are evaluated non-nil, all
such items are applied, but if you set a variable
@code{wl-draft-config-matchone} to @code{t}, only the first matching one
is applied.

At the second of the item, a cons or a list of functions should be
specified.  The car part of the cons should be a header field, a
variable, or a sub-function.  When a header field is specified, the
field will be modified.  If a variable is specified, the value of the
variable will be modified temporarily.

In the cdr part of a cons, not only a variable but also an elisp
expression can be specified as is.  If the car part is a header field
and the cdr part is @code{nil}, the field will be deleted.

See the next example as well:

@lisp
@group
(setq wl-draft-config-alist
      '((reply                         ;; @r{(1)}
         "X-ML-Name: \\(Wanderlust\\|emacs-mime-ja\\|apel-ja\\)"
         ;; @r{applied if it matches the header of the buffer being replied}
         (body . "  Hello.\n")
         (template . "default")
         )))
@end group
@end lisp

As in the (1) above, if a header regexp is prepended with @code{reply},
it is applied when the draft is prepared by @code{wl-summary-reply} for
example, and when it matches the header being replied.  It is ignored
when there is no buffer being replied, like after @code{wl-draft} was
invoked.

Note that @code{wl-draft-config-alist} is applied only once when
@code{wl-draft-send-and-exit} or @code{wl-draft-send} is invoked.
Therefore, if you want to apply @code{wl-draft-config-alist} again after 
aborting transmission, execute @kbd{C-c C-e}
(@code{wl-draft-config-exec}) explicitly.

If you don't want to apply @code{wl-draft-config-alist} when 
@code{wl-draft-send-and-exit} or @code{wl-draft-send} is invoked,
do the following:

@lisp
(remove-hook 'wl-draft-send-hook 'wl-draft-config-exec)
@end lisp

If you want to apply @code{wl-draft-config-alist} when a draft buffer is 
prepared, do the following:

@lisp
(add-hook 'wl-mail-setup-hook 'wl-draft-config-exec)
@end lisp

If you want to apply @code{wl-draft-config-alist} when you re-edit a mail
from summary mode by typing @kbd{E}(@code{wl-summary-reedit}), do the
following:

@lisp
(add-hook 'wl-draft-reedit-hook 'wl-draft-config-exec)
@end lisp

@subsection Inserting Templates
@cindex Template
@cindex Apply Template

Set a variable @code{wl-template-alist}, and type @kbd{C-c C-j} or
@kbd{M-x wl-template-select} in the draft buffer.

The format of @code{wl-template-alist} is almost the same as
@code{wl-draft-config-alist}.

@lisp
@group
(setq wl-template-alist
      '(("default"
         ("From" . wl-from)
         ("Organization" . "~/.wl sample")
         (body . "Hello.\n"))
        ("report"
         (template . "default")                 ;; @r{(a)}
         ("To" . "jousi@@kaisha.jp")
         ("Subject" . "Report")
         (body-file . "~/work/report.txt")
         )
        ))
@end group
@end lisp

As you can see, the only difference is item (template) names such as
@samp{default} and @samp{report}, instead of a regexp of header.
Because definition of each item is the same as
@code{wl-draft-config-alist}, you can call another template, like (a).

Executing the command @code{wl-template-select} results in template
selection, but the result differs depending on variable
@code{wl-template-visible-select}.

If @code{wl-template-visible-select} is @code{t} (default), a buffer
window is shown below the draft buffer.  You can select a template by
@kbd{n} and @kbd{p} seeing the buffer window.

Press the @key{RET} key and the template is actually applied to the draft
buffer.  If you press @kbd{q}, nothing is applied.  In addition, you can 
adjust the window size by @code{wl-template-buffer-lines}.

If @code{wl-template-visible-select} is @code{nil}, you should type the
name of the template in the mini buffer.

As shown in the example in @code{wl-draft-config-alist}, you can select
@samp{default} template by writing:

@lisp
(template . "default")
@end lisp

@subsection Sending mail by POP-before-SMTP
@cindex POP-before-SMTP

You can send mail by POP-before-SMTP with this single line:

@lisp
(setq wl-draft-send-mail-func 'wl-draft-send-mail-with-pop-before-smtp)
@end lisp

@noindent
Configure the following variables if you need.

@table @code
@item wl-pop-before-smtp-user
The POP user name for POP-before-SMTP authentication.
If unset, @code{elmo-default-pop3-user} is used.

@item wl-pop-before-smtp-server
The POP server name for POP-before-SMTP authentication.
If unset, @code{elmo-default-pop3-server} is used.

@item wl-pop-before-smtp-authenticate-type
The POP authentication method for POP-before-SMTP authentication.
If unset, @code{elmo-default-pop3-authenticate-type} is used.

@item wl-pop-before-smtp-port
The POP port number for POP-before-SMTP authentication.
If unset, @code{elmo-default-pop3-port} is used.

@item wl-pop-before-smtp-stream-type
If non-nil, POP connection is established using SSL.  If
@code{starttls}, STARTTLS (RFC2595) connection will be established.  If
unset, @code{elmo-default-pop3-stream-type} is used.
@end table

If variables for POP-before-SMTP (@code{wl-pop-before-smtp-*}) are 
unset, settings for POP folders (@code{elmo-default-pop3-*}) are
used.
Therefore, if SMTP server and POP server are actually the same, and if
POP folder per default (such as @samp{&}) is available, no settings are
required.

Refer to the following URL about POP-before-SMTP.

@example
@group
http://spam.ayamura.org/tools/smPbS.html
http://www.iecc.com/pop-before-smtp.html
@end group
@end example

@section Key Bindings
@cindex Keybind, Draft Mode
@cindex Keybind, Draft Buffer

@table @kbd

@item C-c C-y
@kindex C-c C-y (Draft)
@findex wl-draft-yank-original
Cites the content of the current message buffer.
(@code{wl-draft-yank-original})

@item C-c C-p
@kindex C-c C-p (Draft)
@findex wl-draft-preview-message
Previews the content of the current draft.
This is useful for previewing MIME multi-part messages.
(@code{wl-draft-preview-message})

@item C-c C-s
@kindex C-c C-s (Draft)
@findex wl-draft-send
Sends the content of the current draft.  Does not erase the draft buffer.
This is useful for sending multiple messages, which are a little different
from each other.
(@code{wl-draft-send})

@item C-c C-c
@kindex C-c C-c (Draft)
@findex wl-draft-send-and-exit
Sends the content of the current draft and erases the draft buffer.
(@code{wl-draft-send-and-exit})

@item C-x C-s
@kindex C-x C-s (Draft)
@findex wl-draft-save
Save the current draft.
(@code{wl-draft-save})

@item C-c C-k
@kindex C-c C-k (Draft)
@findex wl-draft-kill
Kills the current draft.
(@code{wl-draft-kill})

@item C-x k
@kindex C-x k (Draft)
@findex wl-draft-mimic-kill-buffer
Kills the current draft.
(@code{wl-draft-mimic-kill-buffer})

@item C-c C-z
@kindex C-c C-z (Draft)
@findex wl-draft-save-and-exit
Saves the current draft, and erases the draft buffer.
This is useful if you want to suspend editing of the draft.
You can resume editing by pressing @kbd{E} (@code{wl-summary-reedit}) in
the @samp{+draft} folder.
(@code{wl-draft-save-and-exit})

@item C-c C-r
@kindex C-c C-r (Draft)
@findex wl-caesar-region
Encodes or decodes the specified region in Caesar cipher.
(@code{wl-caesar-region})

@item M-t
@kindex M-t (Draft)
@findex wl-toggle-plugged
Toggles off-line/on-line states of Wanderlust.
(@code{wl-toggle-plugged})

@item C-c C-o
@kindex C-c C-o (Draft)
@findex wl-jump-to-draft-buffer
Jumps to the other draft buffer, if exists.
With prefix argument, reads a file (if any) from the draft folder when
there is no such buffer.
(@code{wl-jump-to-draft-buffer})

@item C-c C-e
@kindex C-c C-e (Draft)
@findex wl-draft-config-exec
Applies @code{wl-draft-config-alist}.
(@code{wl-draft-config-exec})

@item C-c C-j
@kindex C-c C-j (Draft)
@findex wl-template-select
Selects a template.
(@code{wl-template-select})

@item C-c C-a
@kindex C-c C-a (Draft)
@findex wl-draft-insert-x-face-field
Inserts the content of a file @file{~/.xface} (the value of the variable
@code{wl-x-face-file}) as an @samp{X-Face:} field in the draft buffer.

There should be encoded X-Face strings as a content of a file @file{~/.xface}.
(@code{wl-draft-insert-x-face-field})
@end table

@section Customizable Variables

@table @code
@item wl-subscribed-mailing-list
@vindex wl-subscribed-mailing-list
The initial setting is @code{nil}.  Mailing lists to which you
subscribe.  If any of these are contained in @samp{To:} or @samp{Cc:}
field of a reply draft, removes your own address from
@samp{Mail-Followup-To:} and @samp{Cc:}.  And if any of these are
contained in @samp{To:} or @samp{Cc:} field of a message to be
automatically re-filed, the destination folder will be leaned in
connection with the address.

Example:

@lisp
@group
(setq wl-subscribed-mailing-list
      '("wl@@lists.airs.net"
        "apel-ja@@m17n.org"
        "emacs-mime-ja@@m17n.org"))
@end group
@end lisp

@item wl-insert-mail-followup-to
@vindex wl-insert-mail-followup-to
The initial setting is @code{nil}.  If non-nil, @samp{Mail-Followup-To:}
field is automatically inserted in the draft buffer.

@item wl-insert-mail-reply-to
@vindex wl-insert-mail-reply-to
The initial setting is @code{nil}.  If non-nil, @samp{Mail-Reply-To:}
field is automatically inserted in the draft buffer.

@item wl-auto-insert-x-face
@vindex wl-auto-insert-x-face
The initial setting is @code{t}.  If non-nil and there is an encoded
X-Face string in a file @file{~/.xface} (the value of the variable
@code{wl-x-face-file}), inserts it as an @samp{X-Face:} field in the
draft buffer.  If @code{nil}, it is not automatically inserted. Press
@kbd{C-c C-a} to insert.

@item wl-insert-message-id
@vindex wl-insert-message-id
The initial setting is @code{t}.  If non-nil, @samp{Message-ID:} field
is automatically inserted on the transmission.

@item wl-local-domain
@vindex wl-local-domain
The initial setting is @code{nil}.  If @code{nil}, the return value of
the function @code{system-name} will be used as the domain part of
@samp{Message-ID:}.

If @code{system-name} does not return FQDN (i.e. the full name of the
host, like @samp{smtp.gohome.org}), you @strong{must} set this variable
to the string of the local domain name without hostname (like
@samp{gohome.org}).  That is, a concatenation of @code{system-name}
@samp{.} @code{wl-local-domain} is used as domain part of the
@samp{Message-ID:}.

If your terminal does not have global IP, set the value of
@code{wl-message-id-domain}.  (You might be beaten up on the Net News if
you use invalid @samp{Message-ID:}.)

Moreover, concatenation of @code{system-name} @samp{.}
@code{wl-local-domain} will be used as an argument to the HELO command
in SMTP.

@item wl-message-id-domain
@vindex wl-message-id-domain
The initial setting is @code{nil}.  If non-nil, this value is used as a
domain part of the @samp{Message-ID:}.  If your terminal does not have
global IP address, set unique string to this value (e.x. your e-mail
address).

@item wl-message-id-domain
@vindex wl-message-id-domain
The initial setting is @code{nil}.  If @code{nil}, the return value of
the function @code{system-name} will be used as the domain part of
@samp{Message-ID:}.  If @code{system-name} does not return FQDN
(i.e. the full name of the host, like @samp{smtp.gohome.org}), you
@strong{must} set this variable to the string of the full name of the
host.  Otherwise, you might be beaten up on the Net News.

@item wl-draft-config-alist
@vindex wl-draft-config-alist
The initial setting is @code{nil}.  Modifies the draft message just
before the transmission.  The content of @code{wl-draft-config-alist}
will be automatically applied only once on the transmission.  If you
want to apply it manually, use @kbd{C-c C-e}.  This command can be used
many times.

@item wl-template-alist
@vindex wl-template-alist
The initial setting is @code{nil}.
This variable specifies the template to be applied in the draft buffer.

@item wl-draft-config-matchone
@vindex wl-draft-config-matchone
The initial setting is @code{nil}.  If non-nil, only the first matching
item is used when @code{wl-draft-config-alist} is applied.  If
@code{nil}, all matching items are used.

@item wl-template-visible-select
@vindex wl-template-visible-select
The initial setting is @code{t}.
If non-nil, you can preview the result of the template selection in
another window.

@item wl-template-confirm
@vindex wl-template-confirm
The initial setting is @code{nil}.
If non-nil, asks for confirmation when you press the enter key to select
template while previewing.

@item wl-template-buffer-lines
@vindex wl-template-buffer-lines
The initial setting is 7.
If @code{wl-template-visible-select} is non-nil, this variable specifies 
the size of the preview window.

@item wl-draft-reply-buffer-style
@vindex wl-draft-reply-buffer-style
The initial setting is @code{split}.  @code{split} or @code{full} can be
specified.  In the case of @code{full}, the whole frame will be used for
a reply draft buffer when it is prepared.

@item wl-draft-use-frame
@vindex wl-draft-use-frame
The initial setting is @code{nil}.
If non-nil, use new frame for the draft.

@item wl-from
@vindex wl-from
The initial setting is the value of the variable
@code{user-mail-address}.  The value of this variable is inserted as a
@samp{From:} field of the draft when it is prepared.

@item wl-envelope-from
@vindex wl-envelope-from
The initial setting is @code{nil}.
The value of this variable is used for envelope from (MAIL FROM).
If @code{nil}, the address part of @code{wl-from} is used.

@item wl-user-mail-address-list
@vindex wl-user-mail-address-list
The initial setting is @code{nil}.
This is the User's address list.  If you have multiple addresses,
set this variable.

@item wl-fcc
@vindex wl-fcc
The initial setting is @code{nil}.
If non-nil, the value of this variable is inserted as a @samp{Fcc:} of
the draft when it is prepared.  If function is specified, its return
value is used.

@item wl-bcc
@vindex wl-bcc
The initial setting is @code{nil}.
If non-nil, the value of this variable is inserted as a @samp{Bcc:} of
the draft when it is prepared.

@item wl-reply-subject-prefix
@vindex wl-reply-subject-prefix
The initial setting is @samp{Re: }.
In the @samp{Subject:} of the reply draft, this string is prepended to
the @samp{Subject:} of being replied.

@item wl-draft-reply-use-address-with-full-name
@vindex wl-draft-reply-use-address-with-full-name
The initial setting is @code{t}.
If non-nil, insert her full name with address when prepare a draft for
reply a message.  If it is @code{nil}, insert her address only.

@item wl-draft-enable-queuing
@vindex wl-draft-enable-queuing
The initial setting is @code{t}.
This flag controls off-line transmission.  If non-nil, the draft is
sent off-line.

@item wl-draft-use-cache
@vindex wl-draft-use-cache
The initial setting is @code{t}.
If non-nil, cache the message which is sent.

@item wl-auto-flush-queue
@vindex wl-auto-flush-queue
The initial setting is t.
This flag controls automatic transmission of the queue when Wanderlust
becomes on-line.  If non-nil, the queue is automatically transmitted
(with confirmation by @code{y-or-n-p}).  If you want to transmit it
manually, press @kbd{F} in the folder mode.

@item wl-ignored-forwarded-headers
@vindex wl-ignored-forwarded-headers
Initial setting is @samp{\\(received\\|return-path\\|x-uidl\\)}.
All headers that match this regexp will be deleted when forwarding a message.

@item wl-ignored-resent-headers
Initial setting is @samp{\\(return-receipt\\|[bdf]cc\\)}.
All headers that match this regexp will be deleted when resending a message.

@item wl-draft-always-delete-myself
@vindex wl-draft-always-delete-myself
If non-nil, always removes your own address from @samp{To:} and
@samp{Cc:} when you are replying to the mail addressed to you.

@item wl-smtp-posting-server
@vindex wl-smtp-posting-server
The initial setting is @code{nil}.
This is the SMTP server name for mail transmission.

@item wl-smtp-posting-user
@vindex wl-smtp-posting-user
The initial setting is @code{nil}.
This is the user name for SMTP AUTH authentication.  If @code{nil},
@code{smtp-authenticate-user} is used.

@item wl-smtp-authenticate-type
@vindex wl-smtp-authenticate-type
The initial setting is @code{nil}.
This is the authentication method for SMTP AUTH authentication.  If
@code{nil}, @code{smtp-authenticate-type} is used.  If
@code{smtp-authenticate-type} is still @code{nil}, authentication will
not be carried out.

@item wl-smtp-connection-type
@vindex wl-smtp-connection-type
The initial setting is @code{nil}.
This variable specifies how to establish SMTP connections.
If @code{nil}, @code{smtp-connection-type} is used.
If it is @code{starttls}, STARTTLS (RFC2595) is used.

@item wl-nntp-posting-server
@vindex wl-nntp-posting-server
The initial setting is @code{nil}.
This is the NNTP server name used for news submission.
If @code{nil}, @code{elmo-default-nntp-server} is used.

@item wl-nntp-posting-user
@vindex wl-nntp-posting-user
The initial setting is @code{nil}.
This is the user name for AUTHINFO authentication on news submission.
If @code{nil}, @code{elmo-default-nntp-user} is used.
If it is still @code{nil}, AUTHINFO authentication will not be carried out.

@item wl-nntp-posting-port
@vindex wl-nntp-posting-port
The initial setting is @code{nil}.
This is the port number of the NNTP server used for news submission.
If @code{nil}, @code{elmo-default-nntp-server} is used.

@item wl-nntp-posting-stream-type
@vindex wl-nntp-posting-stream-type
The initial setting is @code{nil}.
If @code{nil}, @code{elmo-default-nntp-stream-type} is evaluated.  If non-nil,
SSL is used for news submission.  If @code{starttls}, STARTTLS (RFC2595)
connection will be established.

@item wl-pop-before-smtp-user
@vindex wl-pop-before-smtp-user
The initial setting is @code{nil}.
This is the POP user name for POP-before-SMTP.
If it is @code{nil}, @code{elmo-default-pop3-user} is used.

@item wl-pop-before-smtp-server
@vindex wl-pop-before-smtp-server
The initial setting is @code{nil}.
This is the POP server name for POP-before-SMTP.
If it is @code{nil}, @code{elmo-default-pop3-server} is used.

@item wl-pop-before-smtp-authenticate-type
@vindex wl-pop-before-smtp-authenticate-type
The initial setting is @code{nil}.
This is the authentication method for POP-before-SMTP authentication.
If it is @code{nil}, @code{elmo-default-pop3-authenticate} is used.

@item wl-pop-before-smtp-port
@vindex wl-pop-before-smtp-port
The initial setting is @code{nil}.
This is the POP port number for POP-before-SMTP.  If it is @code{nil},
@code{elmo-default-pop3-port} is used.

@item wl-pop-before-smtp-stream-type
@vindex wl-pop-before-smtp-stream-type
The initial setting is @code{nil}.
This flag controls the use of SSL for POP-before-SMTP.  If it is
@code{nil}, @code{elmo-default-pop3-stream-type} is used.  If @code{starttls},
STARTTLS (RFC2595) connection will be established.

@item wl-draft-queue-save-variables
@vindex wl-draft-queue-save-variables
Specifies a list of variable to which queued messages are saved on the
off-line transmission.

@item wl-draft-sendlog
@vindex wl-draft-sendlog
The initial setting is @code{t}.
If @code{t}, transmission log is written in @file{~/.elmo/sendlog}.  It
is written when:

@itemize @minus
@item drafts are sent by smtp or qmail
@item saved into folders by fcc
@item saved into folders by queuing
@end itemize

(it is written even if the transmission fails).
But transmission by @file{im-wl.el} is not written in the @file{sendlog}
and left to the logging function of @command{imput}.


@item wl-draft-sendlog-max-size
@vindex wl-draft-sendlog-max-size
The initial setting is 20000 (in bytes).
If @code{wl-draft-sendlog} is @code{t}, the log is rotated when it grows
beyond the size specified by this variable.

@item wl-use-ldap
@vindex wl-use-ldap
The initial setting is @code{nil}.
If non-nil, address completion uses LDAP.

@item wl-ldap-server
@vindex wl-ldap-server
The initial setting is @samp{localhost}.
LDAP server name for address completion.

@item wl-ldap-port
@vindex wl-ldap-port
The initial setting is @code{nil}.
If non-nil, the value is used as port number.

@item wl-ldap-base
@vindex wl-ldap-base
The initial setting is @samp{c=US}.
LDAP search starting point (base) for address completion.

@item wl-draft-remove-group-list-contents
@vindex wl-draft-remove-group-list-contents
The initial setting is @code{t}.
If non-nil, remove the group-lists' members in the recipients when
sending the message (group-list means the description such as
@samp{Group: foo@@gohome.org, bar@@gohome.org;} in the recipients).
@end table

@node Disconnected Operations, Expire and Archive, Draft, Top
@chapter Off-line Management
@cindex Disconnected Operations

Wanderlust has on-line and off-line states.

@menu
* Off-line State::              Wanderlust has on-line and off-line states.
* Enable Operations::           Enable Disconeected Operations.
* Plugged Mode::                Switching On-line/Off-line per Server/Port.
* Off-line State settings::     Invoking Wanderlust in the Off-line State.
* Variables of Plugged Mode::   Customize Plugged Mode.
@end menu


@node Off-line State, Enable Operations, Disconnected Operations, Disconnected Operations
@section Off-line State

Wanderlust has on-line and off-line states.  In the off-line state, you
cannot access messages via network, unless they are cached.

@samp{[ON]} in the mode line indicates the on-line state.  @samp{[--]}
in the mode line indicates the off-line state.  In folder or summary
modes, press @kbd{M-t} to switch between off- and on-line.

You can invoke Wanderlust in the off-line state by setting
@code{wl-plugged} to @code{nil} in @file{~/.wl} or anything appropriate.

In the off-line mode, @kbd{n} and @kbd{p} command in the summary mode
ignores uncached messages.


@node Enable Operations, Plugged Mode, Off-line State, Disconnected Operations
@section Enable Disconeected Operations

Even in the off-line state, provided that relevant messages are cached,
and the variable @code{elmo-enable-disconnected-operation} (described
later) is non-nil, you can following operations:
@xref{Plugged Mode}, @xref{Off-line State settings}.

@menu
* Send Messages off-line::      Transmit Messages.
* Re-file and Copy queue::      Re-file and Copy (IMAP4).
* Creation of Folders::         Create Folders off-line (IMAP4).
* Marking::                     Mark (IMAP4).
* Pre-fetching Reservations::   Pre-fetch (IMAP4, NNTP).
@end menu

As soon as Wanderlust becomes on-line, such operations invoked off-line
are reflected in the servers via network.


@node Send Messages off-line, Re-file and Copy queue, Enable Operations, Enable Operations
@subsection Transmission of Messages

You can send mail/news messages off-line (if you are using
@file{im-wl.el}, it is irrelevant).  Messages sent off-line are
accumulated in the queue folder, @samp{+queue}.  These messages are
transmitted at once when Wanderlust becomes on-line.

You can visit @samp{+queue} in the off-line state and confirm content of
messages in the queue.  You can also remove messages.  Removed messages
are not transmitted even in the on-line state.


@node Re-file and Copy queue, Creation of Folders, Send Messages off-line, Enable Operations
@subsection Re-file and Copy (IMAP4)

Re-file and copy operations to IMAP folders invoked during the off-line
state are accumulated in the queue, and reflected in the server side
when Wanderlust becomes on-line.  If you visit destination folders after
off-line re-file or copy, it looks as if messages were appended even in
off-line state.

For the safety reasons, messages re-filed off-line are removed from
source folders only if their @samp{Message-ID:} match messages on the
servers.  While the queue is processed, messages that failed to be
re-filed or copied to the specified folders are appended to the folder
@samp{+lost+found}.


@node Creation of Folders, Marking, Re-file and Copy queue, Enable Operations
@subsection Creation of Folders (IMAP4)

You can create IMAP folders off-line.  The creation of folders are
reflected in the servers when Wanderlust becomes on-line.  At that time, 
if folders failed to be created on the servers for any reasons, messages
re-filed to such folders are appended to the folder @samp{+lost+found}.


@node Marking, Pre-fetching Reservations, Creation of Folders, Enable Operations
@subsection Marking (IMAP4)

Off-line changes in unread/read and importance mark @samp{$} information
are also reflected in the servers when Wanderlust becomes on-line.


@node Pre-fetching Reservations,  , Marking, Enable Operations
@subsection Pre-fetching (IMAP4, NNTP)

You can make reservations for pre-fetching messages in IMAP or NNTP
folders.  Reserved messages are marked with @samp{!} but not cached
yet.  When Wanderlust becomes on-line, they are pre-fetched from
servers.

If the variable @code{elmo-enable-disconnected-operation} is @code{nil},
these off-line operations for IMAP4 and NNTP do not take place, and
off-line re-file, copy or suchlike simply results in error.

Because off-line operations use cache files, it is a bad idea to erase
them by hand; it may cause Wanderlust to malfunction.

If you want to remove caches, be sure to execute @kbd{M-x
elmo-cache-expire-by-size}.  @code{elmo-cache-expire-by-size} does not
remove caches for messages relevant to off-line operations.


@node Plugged Mode, Off-line State settings, Enable Operations, Disconnected Operations
@section Switching On-line/Off-line per Server/Port

@kbd{M-t} described above switches networking states as a whole, but you 
can switch on-line/off-line per server/port.

Pressing @kbd{C-t} in the folder or summary modes brings you in
wl-plugged-mode shown below, in which you can change the plugged state
for each port.

@example
@group
Queuing:[ON] AutoFlushQueue:[--] DisconnectedOperation:[ON]
[ON](wl-plugged)
  [--]hosta
    [--]smtp        +queue: 2 msgs (1,2)        @dots{}@r{sending queue}
    [--]nntp(119)   +queue: 1 msg (3)           @dots{}@r{sending queue}
  [ON]hostb
    [--]imap4/cram-md5(143) %#mh/wl(prefetch-msgs:3,mark-as-important:1)
                            %inbox(delete-msgids:1)    @dots{}@r{dop queue}
    [ON]nntp(119)
    [ON]smtp
@end group
@end example

The first line indicates status of the following three variables, and
simply pressing @kbd{@key{SPC}} or @kbd{@key{RET}} in each labelled
column modifies the values of these variables.

@example
@group
"Queuing"               @code{wl-draft-enable-queuing}
"AutoFlushQueue"        @code{wl-auto-flush-queue}
"DisconnectedOperation" @code{elmo-enable-disconnected-operation}
@end group
@end example

where @samp{[ON]} means its value is @code{t}, and @samp{[--]} means
@code{nil}.

The second and after lines indicate on-line/off-line states of servers
and ports, where @samp{[ON]} stands for on-line and @samp{[--]} for
off-line (in XEmacs or Emacs 21, they are shown with icons).  Pressing
@kbd{@key{SPC}} or @kbd{@key{RET}} in each line switches its state.

@dfn{sending queue} means messages accumulated in the folder
@samp{+queue} for off-line transmission, and @dfn{dop queue} means
off-line operations when @code{elmo-enable-disconnected-operation} is
@code{t}.
@c If the variable @code{elmo-enable-disconnected-operation} is non-nil, 
@c off-line operations are enabled.

They are displayed if there are any of them.  In the example above, in
the sending queue there are two messages (the first and the second in
the queue folder) for smtp to hosta and one (the third) for nntp to
hosta, and in the dop queue there are one for @samp{%inbox} and two for
@samp{%#mh/wl}.

If you change @samp{(wl-plugged)} in the second line, the variable
@code{wl-plugged} is changed, so that the mode line indicator and
plugged states of all ports are affected.  If you change plugged states
of any servers or ports, @samp{(wl-plugged)} in the second line is
affected depending on @code{elmo-plugged-condition} settings and the
plugged state of each port.


@node Off-line State settings, Variables of Plugged Mode, Plugged Mode, Disconnected Operations
@section Invoking Wanderlust in the Off-line State

As described before, if you set @code{wl-plugged} to @code{nil} in
@file{~/.wl} or anything appropriate, you can invoke Wanderlust in the
off-line state.  You can specify off-line state on a per server or port
basis.  Refer to @code{wl-reset-plugged-alist} also.

Usually, when Wanderlust starts up, the plugged state of each port is
read from @file{~/.folder} and @code{wl-smtp-posting-server},
@code{wl-nntp-posting-server} and so on.  If you want to change the
plugged state of these ports or to add other ports, configure
@code{wl-make-plugged-hook} with a function.

@lisp
@group
(add-hook 'wl-make-plugged-hook
          '(lambda ()
             (elmo-set-plugged plugged-value(t/nil) server port)
                 ;; @r{add or change plugged states of the port of the server}
             (elmo-set-plugged plugged-value(t/nil) server)
                 ;; @r{if the port is omitted, all ports are affected}
                 ;; @r{(you cannot omit the port if you newly add the server)}
             ))
@end group
@end lisp


@node Variables of Plugged Mode,  , Off-line State settings, Disconnected Operations
@section Customizable Variables

@table @code
@item wl-plugged
@vindex wl-plugged
If this variable is set to @code{nil}, Wanderlust starts up in off-line
mode from the beginning.

@item wl-queue-folder
@vindex wl-queue-folder
The initial setting is @samp{+queue}.
This is the folder in which messages in the transmission queue are
accumulated.

@item wl-auto-flush-queue
@vindex wl-auto-flush-queue
The initial setting is @code{t}.
This flag controls automatic transmission of the queue when Wanderlust
becomes on-line.  If non-nil, the queue is automatically transmitted
(with confirmation by @code{y-or-n-p}).  If you want to transmit it
manually, press @kbd{F} in the folder mode.

@item elmo-enable-disconnected-operation
@vindex elmo-enable-disconnected-operation
The initial setting is @code{nil}.  Controls off-line operations
regarding IMAP4.  If non-nil, off-line operations are carried out.

@item elmo-lost+found-folder
@vindex elmo-lost+found-folder
The initial setting is @samp{+lost+found}.
This is the folder to which messages are saved when they fails to be
appended while the off-line re-file/copy queue is processed.

@item elmo-plugged-condition
@vindex elmo-plugged-condition
The initial setting is @code{one}.
The value of @code{wl-plugged} reflects the return value of the function 
@code{elmo-plugged-p} (without arguments).
This variable @code{elmo-plugged-condition} specifies the condition on
which the return value of @code{(elmo-plugged-p)} should be t depending on the
plugged state of each port.

@example
'one         : plugged if one or more ports are plugged.
'all         : plugged if all ports are plugged.
'independent : reflects wl-plugged (elmo-plugged) regardless of plugged
               states of the ports.
@var{function}     : reflects the return value of the @var{function}
 functions available per default
 'elmo-plug-on-by-servers
             : reflects the plugged state of the servers specified by the
               variable elmo-plug-on-servers.
 'elmo-plug-on-by-exclude-servers
             : reflects the plugged state of the servers that are not
               in elmo-plug-on-exclude-servers.
                  elmo-plug-on-exclude-servers defaults to
                   '("localhost"
                     (system-name)
                     (system-name)without the domain part)
@end example

@example
@group
Example 1:
 (setq elmo-plugged-condition 'all)
Example 2:
 (setq elmo-plug-on-servers '("smtpserver" "newsserver"))
 (setq elmo-plugged-condition 'elmo-plug-on-by-servers)
Example 3:
 (setq elmo-plug-on-exclude-servers '("localhost" "myname"))
 (setq elmo-plugged-condition 'elmo-plug-on-by-exclude-servers)
@end group
@end example

@item wl-reset-plugged-alist
@vindex wl-reset-plugged-alist
The initial setting is @code{t}.  If non-nil, plugged states are
initialized on a per server or port basis when Wanderlust starts up.

If @code{nil}, plugged states are retained while Emacs is running.  In
other words, they are initialized when Emacs is restarted even if the
value is @code{nil}.
@end table


@node Expire and Archive, Scoring, Disconnected Operations, Top
@chapter Automatic Expiration and Archiving of Messages
@cindex Expire and Archive

@menu
* Expire::      Expiration and Archiving
* Archive::     Archiving All Messages
@end menu


@node Expire, Archive, Expire and Archive, Expire and Archive
@section Expiration
@cindex Expire Message

Expiration means deletion of old messages which have outlasted a
certain period of time.

@code{wl-expire} supports not only simple deletion, but also moving to
specified archiving folders.

@section How to Use

Configure @code{wl-expire-alist} and press @kbd{e} in the folder mode,
or @kbd{M-e} in the summary mode.

@subsection Configuring @code{wl-expire-alist}

An example configuration of @code{wl-expire-alist} is shown below.
Everything in this @code{wl-expire-alist} makes a great difference in
expiration, so be careful.  I advise you to set @code{wl-expire-use-log}
to @code{t}, especially in the initial stage.

@lisp
@group
(setq wl-expire-alist
      '(("^\\+trash$"   (date 14) remove)
                                  ;; @r{delete}
        ("^\\+tmp$"     (date 7) trash)
                                  ;; @r{re-file to @code{wl-trash-folder}}
        ("^\\+outbox$"  (number 300) "$outbox;lha")
                                  ;; @r{re-file to the specific folder}
        ("^\\+ml/tmp$"  nil)
                           ;; @r{do not expire}
        ("^\\+ml/wl$"   (number 500 510) wl-expire-archive-number1 t)
                           ;; @r{archive by message number (retaining numbers)}
        ("^\\+ml/.*"    (number 300 310) wl-expire-archive-number2 t)
                           ;; @r{archive by a fixed number (retaining numbers)}
        ("^\\+diary$"   (date 30) wl-expire-archive-date)
                           ;; @r{archive by year and month (numbers discarded)}
        ))
@end group
@end lisp

Items in the list has the format of:

@example
(@var{regexp-for-folders} @var{specification-of-messages-to-be-deleted} @var{destination})
@end example

@noindent
The folder is examined if it matches @var{regexp-for-folders} from the
beginning of the list.  If you invoke expiration on the folder that does
not match any of them, nothing will happen.  And if either the second or
the third element of the item is @code{nil}, expiration will not take
place.

You can use any one of the following for
@var{specification-of-message-to-be-deleted}:

@table @code
@item (number @var{n1} [@var{n2}])
deletes messages depending on the number of messages in the folder.

@var{n1} is the number of messages which should survive deletion, for example
if its value is 500, the newest 500 messages survive and the rests are
deleted.

@var{n2} is the number of messages in the folder on which expiration should
take place, which defaults to @var{n1} + 1.  For example if its value is 510,
folders with 510 or more messages are expired.
If you configured automatic expiration, frequently used folders may
expire every time it receive messages, and you may be annoyed with the
long delay in reading mail.
In that case, you can set a wide margin between @var{n2} and @var{n1}, so that
expiration would not take place until a certain number of messages
accumulate.

Messages with marks in @code{wl-summary-expire-reserve-marks} (marked
with important/new/unread) are not deleted.
If @code{wl-expire-number-with-reserve-marks} is non-nil, the folder
will expire so as to have 500 messages including such ones.
Otherwise, it will have 500 messages except such ones.

@item (date @var{d1})
deletes messages depending on the dates.

Messages dated @var{d1} or more days ago are deleted, for example if its
value is seven, messages seven days old or more are deleted.  Note that
the date is the one in the @samp{Date:} field of the message, not when
the message entered the folder.

Messages with no or invalid @samp{Date:} field does not expire; you
might have to delete them by hand.
@end table

You can use any one of the following in the place of @var{destination}:

@table @asis
@item @code{remove}
deletes the messages instantly.

@item @code{hide}
hide the messages from summary (messages are not deleted).

@item @code{trash}
moves the messages to @code{wl-trash-folder}.

@item @var{string}(folder)
moves the messages to the folder specified with @var{string}.

It would be useful for specifying an archiving folder, but because this
does not move important messages, it might be better to use the
standard functions described below.

@item @var{function}
invokes the specified @var{function}.

To the @var{function}, three arguments are passed: a folder name, a list
of messages to be deleted, and msgdb information of the summary.  You
can specify function-specific arguments after the name of the
@var{function}.  Note that the list contains messages with marks in
@code{wl-summary-expire-reserve-marks}, be careful in writing your own
function.

These are three standard functions; they moves messages to an archive
folder in the specified way.  This means old messages can be compressed
and saved in a file, being deleted from the original folder.

@table @code
@item wl-expire-archive-number1
re-files to archiving folders corresponding to the message numbers of
the messages being deleted.  For example, a message numbered 102 will be
re-filed to @file{wl-00100.zip}, 390 to @file{wl-00300.zip}, and so on.
If @code{wl-expire-archive-files} is 200, messages will be re-filed to
@file{wl-00000.zip}, @file{wl-00200.zip}, @file{wl-00400.zip}, @dots{}.

The archiving folders to which messages are re-filed are determined by
the name of the folder as follows (in this case, archiving folders are
handled as if @code{elmo-archive-treat-file} were non-nil).

@table @asis
@item If the folder type is localdir:
@file{@var{ArchiveDir}/@var{foldername}-xxxxx.zip}

For example, @samp{+ml/wl} corresponds to @samp{$ml/wl;zip}
(@file{~/Mail/ml/wl-00100.zip}).

@item The folder type is other than localdir:
@file{@var{ArchiveDir}/@var{foldertype}/@var{foldername}-xxxxx.zip}

For example, @samp{%#mh/ml/wl} corresponds to
@samp{$imap4/#mh/ml/wl;zip} (@file{~/Mail/imap4/#mh/ml/wl-00100.zip}).
@end table

As you can see, in the case of localdir, the folder type is not included
in the path name, but otherwise it is included.
And you can control the prefix to the archiving folder name by
@code{wl-expire-archive-folder-prefix}.
Refer to @code{wl-expire-archive-folder-prefix} for details.

@item wl-expire-archive-number2
re-files every certain number of messages to archiving folders.

This differs from @samp{wl-expire-archive-number1} in that this re-files
to the folder up to the specified number regardless of message numbers.
The archiving folders to which messages are re-filed are determined in the 
same way as @code{wl-expire-archive-number1}.

@item wl-expire-archive-date
re-files messages depending on its date (year and month) to archive
folders.

For example, a message dated December 1998 is re-filed to
@code{$folder-199812;zip}.  The name of the archiving folders except the
date part are determined in the same way as
@code{wl-expire-archive-number1}.
@end table

You can set the first argument to these three standard functions to non-nil
in @code{wl-expire-alist} so as to retain message numbers in the folder.
For example, it can be specified just after the name of the function:

@lisp
("^\\+ml/wl$" (number 300 310) wl-expire-archive-number1 t)
@end lisp

If you omit the argument, consecutive numbers from 1 are assigned for
each archiving folder.
@end table

@subsection Treatment for Important or Unread Messages

If you specify any of @code{remove}, @code{trash}, a folder name, or a
standard function, messages with marks in
@code{wl-summary-expire-reserve-marks} (which are called @dfn{reserved
messages} thereafter) are retained.

Per default, this variable include the important, new, and unread marks,
so that messages with these marks are not removed.
Note that you cannot include the temporary mark (i.e. temporary marks
are removed anyway), and be sure to process temporary marks before you
invoke expiration.

@subsection Auto Expiration

The following setup invokes expiration when you move into the summary
mode.  There will be no confirmation, so make sure you made no mistake
in regexp and other settings before you set up this.

@lisp
@group
(add-hook 'wl-summary-prepared-pre-hook 'wl-summary-expire)
@end group
@end lisp

In the folder mode, you can invoke expiration per group as well as per
folder.  Therefore, if you specify @samp{Desktop} group, all folders
matching @code{wl-expire-alist} expire.

@section Tips

@subsection Treating archive folders.
To treat archive folders created by @code{wl-expire-archive-number1} and so on,
you must set non-nil value to @code{elmo-archive-treat-file}.

@subsection Confirming

If you are to use @code{remove}, try @code{trash} at first and see
messages move to @code{wl-trash-folder} as expected, then replace it
with @code{remove}.  It would be dangerous to use @code{remove} from the
beginning.

If you are to use @code{wl-expire-archive-number1} and the like, try to
make a folder of the archiver type (@code{zip} or @code{lha}) and see if
you can append messages to it.  Even if settings in
@code{wl-expire-alist} and @code{elmo-archive} are correct, messages
would not be saved anywhere and disappeared in case the archiver program
fails.

After you make sure you can archive to the folder correctly, you can
invoke expiration and utilize the log.

If you set @code{wl-expire-use-log} to @code{t},
@file{~/.elmo/expired-log} should contain the log, for example:

@example
@group
delete  +ml/wl  (593 594 595 596 597 598 599)
move    +ml/wl -> $ml/wl-00600;tgz;wl  (600 601 602)
@end group
@end example

The first column indicates the operation, i.e. @samp{delete},
@samp{copy}, or @samp{move}.  The next is the name of the folder that
expired.  In the case of @samp{copy} and @samp{move}, the destination
folder is recorded after @samp{->}.  The last is the list of message
numbers that are actually deleted or moved (in the case of @samp{copy}
and @samp{move}, the number is the one in the source folder, rather than
the destination folder).

@subsection Re-filing Reserved Messages

The three standard functions copy reserved messages to the archive
folder, but do not delete them from the source folder.  Because
reserved messages and the like always remain, they are recorded in
@file{~/.elmo/expired-alist} so that they are not copied over and over
again.  They are not recorded if copied by @code{wl-summary-archive}.

If you enabled logging, usually @samp{move} is recorded for re-filing,
but instead @samp{copy} and @samp{delete} are recorded separately if
reserved messages are involved.  This is because it actually copies
messages including reserved, then deletes ones except reserved in that
case.

@section Customizable Variables

@table @code
@item wl-expire-alist
@vindex wl-expire-alist
The initial setting is @code{nil}.
This variable specifies folders and methods to expire.  For details,
refer to @code{wl-expire-alist} settings above.

@item wl-summary-expire-reserve-marks
@vindex wl-summary-expire-reserve-marks
The initial setting is the list below.

@lisp
@group
(list wl-summary-important-mark
      wl-summary-new-mark
      wl-summary-unread-mark
      wl-summary-unread-uncached-mark
      wl-summary-unread-cached-mark)
@end group
@end lisp

Messages with these marks are retained in the folder, even after
expiration.
Only permanent marks can be listed, not temporary marks.

You can list marks one by one as in the default; you can use the
following settings as well:

@table @code
@item all
All messages with permanent marks are retained,
i.e. @code{wl-summary-read-uncached-mark} is included in addition to the 
defaults.

@item none
All messages are handled as usual ones that are already read, no matter
what marks they have; even important messages are deleted.
@end table

@item wl-expire-archive-files
@vindex wl-expire-archive-files
The initial setting is 100.
This variable specifies the number of messages to be retained in one
archiving folder.

@item wl-expire-number-with-reserve-marks
@vindex wl-expire-number-with-reserve-marks
The initial setting is @code{nil}.
If non-nil, if expiring messages are specified by @code{number},
messages with @code{wl-summary-expire-reserve-marks} are also retained.

@item wl-expire-archive-get-folder-func
@vindex wl-expire-archive-get-folder-func
The initial setting is @code{wl-expire-archive-get-folder}.

This variable specifies a function that returns the name of an archiving 
folder for standard functions in the place of @var{destination}.
You can use the following three variables for simple modification of
folder names; if you want more complex settings, define your own
function in this variable.

@code{wl-expire-archive-get-folder} can be customized by these
variables:
@itemize @bullet
@item @code{wl-expire-archive-folder-name-fmt}
@item @code{wl-expire-archive-folder-type}
@item @code{wl-expire-archive-folder-prefix}
@end itemize

@item wl-expire-archive-folder-name-fmt
@vindex wl-expire-archive-folder-name-fmt
The initial setting is @samp{%s-%%05d;%s}.
This is a @code{format} string for archiving folders used in
@code{wl-expire-archive-number1} and @code{wl-expire-archive-number2}.
Note that you must specify the message number by @samp{%%d}, because it
is parsed twice by @code{format}.

If you modify this, adjust @code{wl-expire-archive-folder-num-regexp} as
well.

@item wl-expire-archive-date-folder-name-fmt
@vindex wl-expire-archive-date-folder-name-fmt
The initial setting is @samp{%s-%%04d%%02d;%s}.
This is a @code{format} string for archiving folders used in
@code{wl-expire-archive-date}.  Note that you must specify the message
number by @samp{%%d}, because it is parsed twice by @code{format}.
There should be @samp{%%d} twice, one for the year and the other for the
month.

If you modify this, adjust
@code{wl-expire-archive-date-folder-num-regexp} as well.

@item wl-expire-archive-folder-type
@vindex wl-expire-archive-folder-type
The initial setting is @code{zip}.
This variable specifies an archiver type of the archiving folders.

@item wl-expire-archive-folder-prefix
@vindex wl-expire-archive-folder-prefix
The initial setting is @code{nil}.
This variable specifies the prefix (directory structure) to archiving
folders.
Exercise extreme caution in using this feature, as it has not been
seriously tested.
In the worst case, there is a fear of destructing archiving folders.

@table @code
@item nil
There will be no prefix.

@item short
For example, @samp{+ml/wl} will be prefixed by @samp{wl}, resulting in
@samp{$ml/wl-00000;zip;wl}.

@item t
For example, @samp{+ml/wl} will be prefixed by prefix @samp{ml/wl},
resulting in

@samp{$ml/wl-00000;zip;ml/wl}.
@end table

@item wl-expire-archive-folder-num-regexp
@vindex wl-expire-archive-folder-num-regexp
The initial setting is @samp{-\\([-0-9]+\\);}.
This variable specifies the regular expression to be used for getting
message numbers from multiple archiving folders specified by
@code{elmo-list-folders}.
Set it in accordance with @code{wl-expire-archive-folder-name-fmt}.

@item wl-expire-archive-date-folder-num-regexp
@vindex wl-expire-archive-date-folder-num-regexp
The initial setting is @samp{-\\([-0-9]+\\);}.
This is the regular expression to be used for getting message numbers
from multiple archiving folders specified by @code{elmo-list-folders}.
Set it in accordance with @code{wl-expire-archive-date-folder-name-fmt}.

@item wl-expire-delete-oldmsg-confirm
@vindex wl-expire-delete-oldmsg-confirm
The initial setting is @code{t}.
If non-nil, messages older than the one with the largest number will be
deleted with confirmation.
If @code{nil}, they are deleted without confirmation.

This feature is valid only if non-nil is specified as a argument to the
standard functions so as to retain numbers.

@item wl-expire-use-log
@vindex wl-expire-use-log
The initial setting is @code{nil}.
If non-nil, expiration logs are recorded in @file{~/.elmo/expired-log}.
They are appended but not truncated or rotated automatically; you might
need to remove it manually.

@item wl-expire-add-seen-list
@vindex wl-expire-add-seen-list
The initial setting is @code{t}.

If non-nil, when messages are re-filed by expiration, read/unread
information is passed to the destination folder.

However if you do not read the destination folder from Wanderlust,
@file{seen} under @file{~/.elmo/} grows larger and larger, so you might
want to set this to @code{nil} if you are simply saving to some
archiving folders.  Even if its value is @code{nil}, messages in the
archiving folders are simply treated as unread; it does not affect
expiration itself.

@item wl-expire-folder-update-msgdb
@vindex wl-expire-folder-update-msgdb
The initial setting is @code{t}.
If @code{t}, in the folder mode, expiration is carried out after
updating summary information.  If you specified a list of regular
expressions of folder names, summary information is updated for matching
folders only.
@end table


@node Archive,  , Expire, Expire and Archive
@section Archiving Messages

@subsection Archiving Messages
@kbd{M-x wl-summary-archive} copies the whole folder to archiving
folders.  If there are the archiving folders already, only new messages
are appended.

You can use @code{wl-archive-alist} in order to specify how messages are 
archived according to their folder names, as in @code{wl-expire-alist}.
For example:

@lisp
@group
(setq wl-archive-alist
      '(("^\\+tmp$"     wl-archive-date)
        ("^\\+outbox$"  wl-archive-number2)
        (".*"           wl-archive-number1)))
@end group
@end lisp

Each item in the list has the following format:

@example
(@var{folders-regexp}  @var{deleting-function})
@end example

As you can see, you can only use a function after @var{folders-regexp}.
Per default, there are three functions:

@itemize @bullet
@item @code{wl-archive-number1}
@item @code{wl-archive-number2}
@item @code{wl-archive-date}
@end itemize

As inferred from their names, they work similarly to "expire" versions,
other than the following points:

@itemize @minus
@item No messages are deleted
@item Message numbers are retained even if invoked without arguments
@end itemize

These functions are good to archive all messages in a folder by their
numbers or by their dates.
These are also useful for backup or confirmation purposes before
expiration.
If you try to re-file them after they are archived, they are deleted but 
not re-filed.

Per default, the archiving folders to which messages are copied are
determined automatically by @code{wl-expire-archive-get-folder-func}.
You can copy to a specific folder by invoking with a prefix argument,
i.e. @kbd{C-u M-x wl-summary-archive}.

Note that this feature has not been seriously tested, because you can
simply copy to an archiving folder, for example by
@code{wl-summary-copy-region}.

The archiving folders are determined by the same logic as in
@code{wl-summary-expire}; the following customizable variables are
relevant:

@itemize @bullet
@item @code{wl-expire-archive-files}
@item @code{wl-expire-archive-get-folder-func}
@item @code{wl-expire-archive-folder-name-fmt}
@item @code{wl-expire-archive-folder-type}
@item @code{wl-expire-archive-folder-prefix}
@item @code{wl-expire-archive-folder-num-regexp}
@end itemize

@subsection Customizable Variables

@table @code
@item wl-archive-alist
@vindex wl-archive-alist
The initial setting is the list shown below:

@lisp
@group
((".*" wl-archive-number1))
@end group
@end lisp

@noindent
This variable specifies a function that copies to archiving folders.
To the function, three arguments are passed: a folder name, a list of
messages in the folder, and msgdb information of the summary.
Needless to say, you can use your own function.
@end table


@node Scoring, Customization, Expire and Archive, Top
@chapter Score of the Messages
@cindex Scoring
@c @cindex Kill File

Scoring is the function that associates a score (value) with each
message, and marks as read or deletes from the summary according to it.

You can put target or important marks on essential messages, or read marks
on the ones you do not want to read, for example spam articles.

This scoring function has a capability and a format similar to the one
that Gnus has, although there are some unsupported features and
Wanderlust specifics.
@xref{Scoring, , ,gnus, The gnus Newsreader}.

@menu
* Score Commands::             Score Commands
* Score File Format::          Score File Format
@end menu


@node Score Commands, Score File Format, Scoring, Scoring
@section Score Commands
@cindex Score Commands

@subsection Score File Specification

@code{wl-score-folder-alist} specifies score files or variables in which 
scores are defined, corresponding to folder names.

@lisp
@group
(setq wl-score-folder-alist
      '(("^-.*"
         "news.SCORE"
         "my.SCORE")
        (".*"
         "all.SCORE")))
@end group
@end lisp

If paths to the score files are omitted, the directory specified in the
variable @code{wl-score-files-dir} is assumed.

No matter what you write in @code{wl-score-folder-alist}, the default
score file @code{wl-score-default-file} (@file{all.SCORE}) is always
read (it does not have to exist).
Therefore, in the example above, the three score files,
@file{news.SCORE}, @file{my.SCORE}, and @file{all.SCORE} are read for
the folders that matches @samp{^-.*}.

@subsection Scored Messages

Scores are attached to the messages that are specified by
@code{wl-summary-score-marks} temporarily when the summary is updated;
when you exit from the summary, the scores are removed and reverts to
the defaults.

@subsection Creation of Score Files

In the summary buffer, move to an appropriate message and type @kbd{L}.
Then type @kbd{s}, @kbd{s}, and @kbd{p} at a prompt in a mini-buffer.
The string in Subject is presented.  Edit it and press @kbd{@key{RET}}.

This makes @minus{}1000 are scored for messages with the same
@samp{Subject:} as the string you entered.  That is, such a score file
is created automatically.

Then, try typing @kbd{h} and @kbd{e} in the same summary buffer.
The score file you just made appears.
This buffer is called @dfn{score editing buffer} thereafter.
When you type @kbd{C-c C-e} in it, you are prompted in the mini-buffer
as you are previously; type @kbd{a}.  Then a score entry for "From"
should be inserted.
In this way, you can create a score file easily either in the summary
buffer or in the score editing buffer.

By the way, you might be aware the numbers of key strokes are different
between @kbd{s s p} and @kbd{a}.
This is determined by @code{wl-score-header-default-entry}.
This variable specifies the default score entries corresponding to
header fields.
For example, for "subject" field, a type and a time limit are prompted,
but for "from" field, they are fixed upon automatically as substring and
permanent respectively.
However, score values can be modified by the prefix argument.
Typing @kbd{?} at the mini-buffer shows a help on keys and corresponding 
headers and types.

At last, type @kbd{C-c C-c} in the score editing buffer.  This saves the 
score file and terminates the edit mode.  Typing @kbd{C-c C-c} after
erasing contents of the buffer deletes the score file being edited.

@subsection Tips

@subsubsection Selecting Score Files

You can change score files to which scores are appended by
@code{wl-summary-increase-score} and @code{wl-summary-lower-score} by
@code{wl-score-change-score-file}.

@subsubsection Summing Up the Score

If you add the same entries by @code{wl-summary-increase-score},
@code{wl-summary-lower-score}, and @code{wl-score-edit-insert-entry},
scores for the entry is summed up.

For example, if you create @samp{from} entry with the score of @minus{}1000 by
@kbd{L a} and again @samp{from} with @minus{}200, one entry with the score of
@minus{}1200 will be created as a result.

@subsubsection Creating Thread Key

Creating @samp{Thread} key by @code{wl-summary-increase-score} or
@code{wl-summary-lower-score} appends @samp{Message-ID} of all children.

@subsubsection Creating Followup Key

Creating @samp{Followup} key by @code{wl-summary-increase-score} or
@code{wl-summary-lower-score} appends @samp{Message-ID} of the message
at the cursor to @samp{References} key.
If @code{wl-score-auto-make-followup-entry} is non-nil,
@samp{Message-ID} of all messages to be followed up within dates
specified by @code{wl-score-expiry-days}.

@subsection Key Bindings

@table @kbd
@item K
@kindex K (Summary)
@findex wl-summary-increase-score
Increases the score for the current message.
And the score entry is appended to the score file at the same moment.
You can specify the score value by a prefix argument.

@item L
@kindex L (Summary)
@findex wl-summary-lower-score
Decreases the score for the current message.
And the score entry is appended to the score file at the same moment.
You can specify the score value by a prefix argument.

@item h R
@kindex h R (Summary)
@findex wl-summary-rescore
Re-applies the scoring.
However, already scored messages are not scored anew.

@item h c
@kindex h c (Summary)
@findex wl-score-change-score-file
Changes the score file currently selected.

@item h e
@kindex h e (Summary)
@findex wl-score-edit-current-scores
Edits the score file currently selected.
If there are multiple score files, the previously specified one is
selected.

@item h f
@kindex h f (Summary)
@findex wl-score-edit-file
Edits an arbitrary score file and selects it.

@item h F
@kindex h F (Summary)
@findex wl-score-flush-cache
Erases caches associated to the score files that are read.
If you modified score files directly (from other than Wanderlust), you
need to re-read them after erasing the cache.

@item h m
@kindex h m (Summary)
@findex wl-score-set-mark-below
Specifies the criterion for scores to be marked as read.
Messages with scores less than this value are marked as read.

@item h x
@kindex h x (Summary)
@findex wl-score-set-expunge-below
Specifies the criterion for scores to be deleted from the summary.
Messages with scores less than this value are deleted.
"Deleted" means it is not shown; they are not removed from the summary
information or the folder.
The deleted messages can be shown by rescan-noscore again.
@end table

@subsection Key Bindings in the Score Editing Buffer

@table @kbd
@item C-c C-k
@kindex C-c C-k (Score Mode)
@findex wl-score-edit-kill
Abandons the file being edited.

@item C-c C-c
@kindex C-c C-c (Score Mode)
@findex wl-score-edit-exit
Saves the file being edited, and quits from the edit mode.

@item C-c C-p
@kindex C-c C-p (Score Mode)
@findex wl-score-pretty-print
Re-draws the score.

@item C-c C-d
@kindex C-c C-d (Score Mode)
@findex wl-score-edit-insert-date
Inserts the number of dates from Dec. 31, 1 B.C.
It is used for creating the third factor of time-limited scores.

@item C-c C-s
@kindex C-c C-s (Score Mode)
@findex wl-score-edit-insert-header
Inserts the header of the message selected in the summary buffer.

@item C-c C-e
@kindex C-c C-e (Score Mode)
@findex wl-score-edit-insert-entry
Inserts the score entry of the message selected in the summary buffer.
@end table

@subsection Customizable Variables

@table @code
@item wl-summary-default-score
@vindex wl-summary-default-score
The initial setting is 0 (zero).
This variable specifies the default value of the score.
The score is increased or decreased based upon this value.

@item wl-summary-important-above
@vindex wl-summary-important-above
The initial setting is @code{nil}.
Messages with scores larger than this value are attached with the
important mark (@samp{$}).
If @code{nil}, no important marks are attached.

@item wl-summary-target-above
@vindex wl-summary-target-above
The initial setting is @code{nil}.
Messages with scores larger than this value are attached with the target
mark (@samp{*}).
If @code{nil}, no target marks are attached.

@item wl-summary-mark-below
@vindex wl-summary-mark-below
The initial setting is 0 (zero).
Messages with scores smaller than this value are marked as read.

@item wl-summary-expunge-below
@vindex wl-summary-expunge-below
The initial setting is @code{nil}.
Messages with scores smaller than this value are deleted from the
summary.
If @code{nil}, they are not deleted.

@item wl-summary-score-marks
@vindex wl-summary-score-marks
The initial setting is the list shown below:

@lisp
@group
(list wl-summary-new-mark)
@end group
@end lisp

@noindent
Messages with these marks are scored.

@item wl-use-scoring
@vindex wl-use-scoring
The initial setting is t.
If non-nil, scoring is enabled.

@item wl-score-files-dir
@vindex wl-score-files-dir
The initial setting is @file{~/.elmo/}.
The default directory for score files.

@item wl-score-interactive-default-score
@vindex wl-score-interactive-default-score
The initial setting is 1000.
This value is used as a score when a score factor is @code{nil} in the
score file.  It is also used in @code{wl-summary-increase-score} and
@code{wl-summary-lower-score}, on condition that the value of
@code{wl-score-header-default-entry} is @code{nil}.

@item wl-score-expiry-days
@vindex wl-score-expiry-days
The initial setting is 7.
This is the number of days before time-limited scores are deleted.

@item wl-score-update-entry-dates
@vindex wl-score-update-entry-dates
The initial setting is @code{t}.
If non-nil, it enables deletion of time-limited scores.

@item wl-score-header-default-entry
@vindex wl-score-header-default-entry
Specifies the default value for each header field for score entries
created by @code{wl-summary-increase-score},
@code{wl-summary-lower-score}, and @code{wl-score-edit-insert-entry}.

@item wl-score-simplify-fuzzy-regexp
@vindex wl-score-simplify-fuzzy-regexp
In the case of a type of a score entry is @code{fuzzy}, this specifies a
regular expression to be deleted from the string.
Because this is usually used for Subject, the default is prefixes that
are attached by mailing list programs.

@item wl-summary-rescore-partial-threshold
@vindex wl-summary-rescore-partial-threshold
The initial setting is 200.
When sync-all or rescan is executed, if there are messages more than
this value, only the last same number of messages as this value are
scored.

@item wl-summary-auto-sync-marks
@vindex wl-summary-auto-sync-marks
If non-nil, unread/important marks are synchronized when the summary
does.
Unread marks reflect information on the IMAP4 server.
Important marks reflect information on the IMAP4 server (flagged or
not), and contents of @samp{'mark} folder.
The initial setting is @code{t}.
@end table


@node Score File Format,  , Score Commands, Scoring
@section Score File Format
@cindex Score File Format

The format of score files are the same as Gnus, and basically you can
use Gnus score files as they are.  But they are not fully compatible
because some keys are not supported and there are Wanderlust specifics.
@xref{Score File Format, , ,gnus, The gnus Newsreader}.

@lisp
@group
(("subject"
  ("for sale" -1000 nil s)
  ("profit" -1000 nil s))
 ("from"
  ("spam@@spamspamspam" -10000 nil s))
 ("followup"
  ("my@@address" 3001 nil s))
 ("chars"
  (1000000 -10 nil >))
 (important 5000)
 (target 3000)
 (mark 0)
 (expunge -3000))
@end group
@end lisp

@table @code
@item string
If the key is a string, it is the name of the header to be matched.
The following keys are available:
@code{Subject}, @code{From}, @code{Date}, @code{Message-ID},
@code{References}, @code{To}, @code{Cc}, @code{Chars}, @code{Lines},
@code{Xref}, @code{Extra}, @code{Followup}, @code{Thread}
@code{Chars} and @code{Lines} mean the size and the number of lines of
the message, respectively.  @code{Extra}, @code{Followup}, @code{Thread}
are described later.
The rest corresponds the field of the same name.

Arbitrary numbers of core entries are specified after the key.
Each score entry consists of these five factors:

@enumerate
@item
A factor that matches header.  This should be a number in the cases of
@code{lines} and @code{chars}, otherwise a string.

@item
A score factor.  When the first item matches, the score of the message
is increased or decreased by this value.

@item
A time limiting factor.  If @code{nil}, the score is permanent, and in the case
of a number, the score is deleted if it does not match for days
(@code{wl-score-expiry-days}) from the date specified by this.
The date is since Dec. 31, 1 B.C.

@item
A type factor.  This specifies the way the first factor matches.
Available types depend on keys.

@table @dfn
@item From, Subject, References, Message-ID
For these keys in string, @code{r} and @code{R} (regexp),
@code{s} and @code{S} (substring), @code{e} and @code{E} (exact match),
as well as @code{f} and @code{F} (fuzzy) can be used.
@code{R}, @code{S}, @code{E}, and @code{F} are case sensitive.

@item Lines, Chars
For these keys, the following five numerical relative operators can be
used: @code{<}, @code{>}, @code{=}, @code{>=}, @code{<=}.

@item Followup
This key matches @code{From} header, and scores all follow-ups to the
message.
For example, it would be useful for increasing scores for follow-ups to
you own article.

You can use the same types as @code{From} except for @code{f}.
And a @samp{Followup} entry is automatically appended to the score file.

@item Thread
This key scores (sub-)threads beginning with @code{Message-ID} @var{x}.
A @samp{Thread} entry is automatically appended for each article that
has @var{x} in the @code{References} header.
You can make sure the whole thread including messages that does not have
all ancestors @code{Message-ID} in @code{References} is scored.

You can use the same types as @code{References} except for @code{f}.
And a @samp{Thread} entry is automatically appended to the score file.
@end table

@item
A factor for extension header.  This is meaningful only if the key is
@code{Extra}.
This specifies headers to be matched other than standard headers like
@code{Subject} and @code{From}.
Note that you should specify the header in
@code{elmo-msgdb-extra-fields} also.
Therefore it does not work in folders where extension headers cannot be
retrieved.

@end enumerate

The sum of these scores @emph{after all factors are applied} becomes the 
score of the message.

@cindex Score File Atoms
@item mark
Messages with a score less than this value is marked as read.
The default is @code{wl-summary-mark-below}.

@item expunge
Messages with a score less than this value is deleted from the summary.
The default is @code{wl-summary-expunge-below}.

@item mark-and-expunge
Both @code{mark} and @code{expunge} are applied,
i.e. messages with a score less than this value is marked as read and
deleted from the summary.

@item target
Messages with a score greater than this value is attached with temp
marks.
The default is @code{wl-summary-target-above}.

@item important
Messages with a score greater than this value is attached with important
marks.
The default is @code{wl-summary-important-above}.
@end table

@subsection Caveats

Not to mention the @code{extra} key, if @code{lines} or @code{xref} keys 
are used, you need to set @code{elmo-msgdb-extra-fields}.

@lisp
(setq elmo-msgdb-extra-fields '("lines" "xref"))
@end lisp

There are other restrictions as shown below:

@itemize @bullet
@item Because @samp{References} field in the summary information
contains only the last @samp{Message-ID}, @code{references} key matches
the last one only.
@end itemize

Keys that can be seen by folder of types:

@example
@group
                        chars lines xref  extra
localdir,localnews        Y     E     E     E
nntp (supporting xover)   Y     E     E     N
     (otherwise)          N     E     E     E
imap4                     Y     E     E     E
pop3                      N     E     E     E

                Y: can be seen
                N: cannot be seen (ignored)
                E: can be seen with @code{elmo-msgdb-extra-fields} settings
@end group
@end example


@node Customization, Mailing List, Scoring, Top
@chapter Customizing Wanderlust
@cindex Customization

@menu
* Living with other packages:: Living with other packages
* Highlights::                 Highlights
* Biff::                       Notify Mail arrival
* Advanced Settings::          Advanced Settings
* Customizable Variables::     Customizable Variables
* Hooks::                      Hooks
@end menu


@node Living with other packages, Highlights, Customization, Customization
@section Living with other packages

Examples with other packages.

@menu
* imput::                       imput (im-wl.el)
* BBDB::                        BBDB
* supercite::                   supercite.el
* mu-cite::                     mu-cite.el
* x-face-mule::                 x-face-mule.el
* dired-dd::                    dired-dd.el
@end menu


@node imput, BBDB, Living with other packages, Living with other packages
@subsection imput
@pindex imput
@cindex im-wl

Place @file{util/im-wl.el} on the @code{load-path} and do the following
settings.

If @command{imput} is on the @code{exec-path} at the installation,
@file{im-wl.el} is byte-compiled and installed.  @xref{Install}.

@lisp
@group
(autoload 'wl-draft-send-with-imput-async "im-wl")
(setq wl-draft-send-func 'wl-draft-send-with-imput-async)
@end group
@end lisp


@node BBDB, supercite, imput, Living with other packages
@subsection bbdb.el
@pindex BBDB

Place @file{util/bbdb-wl.el} on the @code{load-path} and do the following
settings.

If BBDB is on the @code{load-path} at the installation, @file{bbdb-wl.el} is
byte-compiled and installed.
@xref{Install}.

@lisp
@group
(require 'bbdb-wl)

(bbdb-wl-setup)
;; @r{enable pop-ups}
(setq bbdb-use-pop-up t)
;; @r{auto collection}
(setq bbdb/mail-auto-create-p t)
(setq signature-use-bbdb t)
(setq bbdb-north-american-phone-numbers-p nil)
;; @r{shows the name of bbdb in the summary} :-)
(setq wl-summary-from-func 'bbdb-wl-from-func)
;; @r{automatically add mailing list fields}
(add-hook 'bbdb-notice-hook 'bbdb-auto-notes-hook)
(setq bbdb-auto-notes-alist '(("X-ML-Name" (".*$" ML 0))))
@end group
@end lisp

@node supercite, mu-cite, BBDB, Living with other packages
@subsection sc.el(supercite), sc-register.el
@pindex sc
@pindex supercite

The same setting as usual mailers should be OK.  The following is an
example of settings:

@lisp
@group
(autoload 'sc-cite-original "sc" nil t)
(setq mail-yank-hooks 'sc-cite-original)
(setq sc-preferred-header-style 1)
(setq sc-electric-references-p nil)
(setq sc-citation-leader "")
(setq sc-load-hook '(lambda () (require 'sc-register)))
(setq sc-preferred-attribution 'registeredname)
@end group
@end lisp


@node mu-cite, x-face-mule, supercite, Living with other packages
@subsection mu-cite.el
@pindex mu-cite

The same setting as usual mailers should be OK.  The following is an
example of settings.

If you use mu-cite version 8.0 or earlier:

@lisp
@group
(autoload 'mu-cite/cite-original "mu-cite" nil t)
(setq mail-citation-hook 'mu-cite/cite-original)
@end group
@end lisp

If you use mu-cite version 8.1 or later:

@lisp
@group
(autoload 'mu-cite-original "mu-cite" nil t)
(add-hook 'mail-citation-hook (function mu-cite-original))
@end group
@end lisp

@node x-face-mule, dired-dd, mu-cite, Living with other packages
@subsection x-face-mule.el
@pindex x-face-mule
@pindex bitmap-mule

It depends on the version of x-face-mule.
If you use x-face-mule 0.19 or older, do the following:

@lisp
@group
(setq wl-highlight-x-face-func
      (function
       (lambda (beg end)
        (x-face-mule:x-face-decode-message-header))))
@end group
@end lisp

If you use x-face-mule 0.20 or later, try the following:

@lisp
@group
(setq wl-highlight-x-face-func
      (function
       (lambda (beg end)
        (x-face-mule-x-face-decode-message-header))))
(require 'x-face-mule)
@end group
@end lisp

Use these settings when you use @file{x-face-mule.el} attached to
bitmap-mule 8.0 or later:

@lisp
@group
(autoload 'x-face-decode-message-header "x-face-mule")
(setq wl-highlight-x-face-func 'x-face-decode-message-header)
@end group
@end lisp

If there is an encoded X-Face string in a file @file{~/.xface} (the
value of the variable @code{wl-x-face-file}), it is inserted as a
@samp{X-Face:} field in the draft buffer (if
@code{wl-auto-insert-x-face} is non-nil).


@node dired-dd,  , x-face-mule, Living with other packages
@subsection dired-dd(Dired-DragDrop)
@pindex Dired-DragDrop
@pindex Dired-DD
@cindex Drag and Drop

If you embed @file{dired-dd-mime.el} in the dired-dd package, you can
compose multi-part by simple Drag-and-Drop from dired to the draft
buffer being edited in GNU Emacs (this feature is not Wanderlust
specific, but general-purpose for tm/SEMI).

@lisp
@group
;; @r{dired-dd:} http://www.asahi-net.or.jp/~pi9s-nnb/dired-dd-home.html
(add-hook
 'dired-load-hook
 (function
  (lambda ()
    (load "dired-x")
    ;; @r{Set dired-x variables here.}
    ;; @r{To and flo@dots{}}
    (if window-system
        (progn (require 'dired-dd)
               (require 'dired-dd-mime))))))
@end group
@end lisp


@node Highlights, Biff, Living with other packages, Customization
@section Highlights

@subsection Customizable Variables

@table @code
@item  wl-summary-highlight
@vindex wl-summary-highlight
The initial setting is @code{t}.
If non-nil, the summary is highlighted.

@item  wl-highlight-max-summary-lines
@vindex wl-highlight-max-summary-lines
The initial setting is 10000.
The summary is not highlighted if it has more lines than this value.

@item  wl-summary-highlight-partial-threshold
@vindex wl-summary-highlight-partial-threshold
The initial setting is 1000.
This is a threshold whether the whole summary is highlighted.
If there are more lines of messages in the summary, it is partially
highlighted.

@item  wl-summary-partial-highlight-above-lines
@vindex wl-summary-partial-highlight-above-lines
The initial setting is 30.  If there are more lines of messages than
@code{wl-summary-highlight-partial-threshold} in the summary, messages
after the point that is the same number of lines as this value above the
cursor line are highlighted partially.  (If this value is @code{nil},
the last same number of lines as the value of
@code{wl-summary-highlight-partial-threshold} are highlighted.)

@item wl-highlight-body-too
@vindex  wl-highlight-body-too
The initial setting is @code{t}.
If non-nil, bodies of drafts and messages are also highlighted.

@item  wl-highlight-message-header-alist
@vindex wl-highlight-message-header-alist
When highlighting headers of drafts and messages, this variable
specifies which faces are allocated to important
(@code{wl-highlight-message-important-header-contents}), secondly
important (@code{wl-highlight-message-important-header-contents2}), and
unimportant (@code{wl-highlight-message-unimportant-header-contents})
message headers.
Similarly, it can be used for allocating arbitrary faces to arbitrary
regular expressions.

@item wl-highlight-citation-prefix-regexp
@vindex  wl-highlight-citation-prefix-regexp
Specifies a regular expression to which quoted lines in bodies of 
drafts and messages match.
Bodies matching to this regular expression are highlighted by the faces
specified by (@code{wl-highlight-message-cited-text-*}).

@item  wl-highlight-highlight-citation-too
@vindex wl-highlight-highlight-citation-too
The initial setting is @code{nil}.
If non-nil, the quoting regular expression itself given by
@code{wl-highlight-citation-prefix-regexp} is also highlighted.

@item  wl-highlight-citation-header-regexp
@vindex wl-highlight-citation-header-regexp
Specifies a regular expression that denotes beginning of quotation.
Bodies matching to this regular expression are highlighted by the face
specified by @code{wl-highlight-message-headers}.

@item wl-highlight-max-header-size
@vindex wl-highlight-max-header-size
The initial setting is @code{nil}.  If a header size is larger than this
value, it will not be highlighted.  If @code{nil}, always highlighted
(ignore header size).

@item  wl-highlight-max-message-size
@vindex wl-highlight-max-message-size
The initial setting is 10000.
If a message is larger than this value, it will not be highlighted.
With this variable, highlight is suppressed for uuencode or huge digest
messages.

@item  wl-highlight-signature-separator
@vindex wl-highlight-signature-separator
Specifies regular expressions that denotes the boundary of a signature.
It can be a regular expression, or a list of ones.
Messages after the place that matches this regular expression are
highlighted by the face specified by
@code{wl-highlight-message-signature}.

@item  wl-max-signature-size
@vindex wl-max-signature-size
The initial setting is 400.
This is the largest size for a signature to be highlighted.

@item wl-use-highlight-mouse-line
@vindex  wl-use-highlight-mouse-line
The initial setting is @code{t}.
If non-nil, the line pointed by the mouse is highlighted in the folder
mode, summary mode, and the like.
@end table

@subsection Setting Colors and Fonts of the Characters

If you want to change colors or fonts of the characters, you need to
modify faces defined in Wanderlust.  Use @code{set-face-font} if you
want to change fonts, and @code{set-face-foreground} for colors, and so
on.  You cannot write face settings in @file{.emacs}; write in
@file{~/.wl}.

For example, if you want to change the color for signatures to yellow,
write

@lisp
(set-face-foreground 'wl-highlight-message-signature "yellow")
@end lisp

@noindent
in @file{~/.wl}.

Faces defined in Wanderlust:

@table @code
@item wl-highlight-message-headers
The face for field names of message headers.

@item wl-highlight-message-header-contents
The face for field bodies of message headers.

@item wl-highlight-message-important-header-contents
The face for important parts of message headers.
Per default, this face is used for a body of @samp{Subject:} field.
You can change its value by editing
@code{wl-highlight-message-header-alist}.

@item wl-highlight-message-important-header-contents2
The face for secondly important parts of message headers.
Per default, this face is used for bodies of @samp{From:} and @samp{To:}
fields.  You can change its value by editing
@code{wl-highlight-message-header-alist}.

@item wl-highlight-message-unimportant-header-contents
The face for unimportant parts of message headers.
Per default, this face is used for bodies of @samp{X-} fields
@samp{User-Agent:} fields.  You can change its value by editing
@code{wl-highlight-message-header-alist}.

@item wl-highlight-message-citation-header
The face for headers of quoted messages.

@item wl-highlight-message-cited-text-*
The face for texts of quoted messages.  The last @samp{*} is a
@var{single figure} so that 10 different colors can be used according to
citation levels.

@item wl-highlight-message-signature
The face for signatures of messages.  The initial settings are
@samp{khaki} for light background colors, and @samp{DarkSlateBlue} for
dark background colors.

@item wl-highlight-header-separator-face
The face for header separators of draft messages.

@item wl-highlight-summary-important-face
The face for message lines with important marks in the summary.

@item wl-highlight-summary-new-face
The face for message lines with new marks in the summary.

@item wl-highlight-summary-displaying-face
The face for the message line that is currently displayed.
This face is overlaid.

@item wl-highlight-thread-indent-face
The face for the threads that is currently displayed.

@item wl-highlight-summary-unread-face
The face for message lines with unread marks in the summary.

@item wl-highlight-summary-deleted-face
The face for message lines with delete marks in the summary.

@item wl-highlight-summary-refiled-face
The face for message lines with re-file marks in the summary.

@item wl-highlight-refile-destination-face
The face for re-file information part of message lines with re-file
marks in the summary.

@item wl-highlight-summary-copied-face
The face for message lines with copy marks in the summary.

@item wl-highlight-summary-target-face
The face for message lines with target marks @samp{*} in the summary.

@item wl-highlight-summary-thread-top-face
The face for message lines that are on the top of the thread in the
summary.

@item wl-highlight-summary-normal-face
The face for message lines that are not on top of the thread in the
summary.

@item wl-highlight-folder-unknown-face
The face for folders that are not known to have how many unsync messages
in the folder mode.

@item wl-highlight-folder-zero-face
The face for folders that have no unsync messages in the folder mode.

@item wl-highlight-folder-few-face
The face for folders that have some unsync messages in the folder mode.

@item wl-highlight-folder-many-face
The face for folders that have many unsync messages in the folder mode.
The boundary between `some' and `many' is specified by the variable
@code{wl-folder-many-unsync-threshold}.

@item wl-highlight-folder-unread-face
The face for folders that have no unsync but unread messages in the
folder mode.

@item wl-highlight-folder-killed-face
The face for folders that are deleted from the access group in the
folder mode.

@item wl-highlight-folder-opened-face
The face for open groups in the folder mode.
It is meaningful when @code{wl-highlight-folder-by-numbers} is
@code{nil} or a @var{number}.

@item wl-highlight-folder-closed-face
The face for close groups in the folder mode.
It is meaningful when @code{wl-highlight-folder-by-numbers} is
@code{nil} or a @var{number}.

@item wl-highlight-folder-path-face
The face for the path to the currently selected folder in the folder
mode.

@item wl-highlight-logo-face
The face for logo in the demo.

@item wl-highlight-demo-face
The face for strings (for example, a version number) in the demo.
@end table


@node Biff, Advanced Settings, Highlights, Customization
@section Notify Mail arrival
@cindex Biff

Following setting is to notify mail arrival of @samp{%inbox}
by the indicator on the modeline

@lisp
(setq wl-biff-check-folder-list '("%inbox"))
@end lisp

@subsection Customizable Variables
@table @code
@item wl-biff-check-folder-list
@vindex wl-biff-check-folder-list
The initial setting is @code{nil}.
This is the list of folders to check mail arrival.
If @code{nil}, wl doesn't check mail arrival.

@item wl-biff-check-interval
@vindex wl-biff-check-interval
The initial setting is 40 (in seconds).
Check mail arrival in this period. 
@end table


@node Advanced Settings, Customizable Variables, Biff, Customization
@section Advanced Settings

@menu
* Draft for Reply::             Draft for Reply
* Thread Format::               Appearance of Thread
* User-Agent Field::            @samp{User-Agent:} Header Field
@end menu


@node Draft for Reply, Thread Format, Advanced Settings, Advanced Settings
@subsection Draft for Replay

If you want, when you replying to articles in mailing lists, the address
in Reply-To field of the original message to be prepared to To field of
the reply draft by simply pressing @kbd{a} in the summary mode, try the
following settings:

@lisp
@group
(setq wl-draft-reply-without-argument-list
      '(("Mail-Followup-To" . (("Mail-Followup-To") nil ("Newsgroups")))
        ("Followup-To" . (nil nil ("Followup-To")))
        (("X-ML-Name" "Reply-To") . (("Reply-To") nil nil))
        ("From" . (("From") ("To" "Cc") ("Newsgroups")))))
@end group
@end lisp

@noindent
(Only if there are both of @samp{X-ML-Name:} and @samp{Reply-To:} fields
in the original message, @samp{Reply-To:} field in the original is
copied to @samp{To:} field.)

Moreover, the behavior of @kbd{a} with prefix argument can 
be directed by @code{wl-draft-reply-with-argument-list} as well.

Note: To set the behavior when you reply to the message written by yourself, use
@code{wl-draft-reply-myself-without-argument-list} and
@code{wl-draft-reply-myself-with-argument-list}
instead of them.

@node Thread Format, User-Agent Field, Draft for Reply, Advanced Settings
@subsection Appearance of Threads

@example
@group
  389  09/18(Fri)01:07 [ Teranishi         ] wl-0.6.3
  390  09/18(Fri)07:25 +-[ Tsumura-san       ]
  391  09/18(Fri)19:24 +-[ Murata-san        ]
  392  09/20(Sun)21:49 +-[ Okunishi-san      ]
  396  09/20(Sun)22:11 | +-[ Tsumura-san       ]
  398  09/21(Mon)00:17 |   +-[ Tsumura-san       ]
  408  09/21(Mon)22:37 |     +-[ Okunishi-san      ]
  411  09/22(Tue)01:34 |       +-[ Tsumura-san       ]
  412  09/22(Tue)09:28 |       +-[ Teranishi         ]
  415  09/22(Tue)11:52 |         +-[ Tsumura-san       ]
  416  09/22(Tue)12:38 |           +-[ Teranishi         ]
  395  09/20(Sun)21:49 +-[ Okunishi-san      ]
  397  09/21(Mon)00:15 +-[ Okunishi-san      ]
@end group
@end example

Settings to make appearance of threads like shown above:

@lisp
@group
(setq wl-thread-indent-level 2)
(setq wl-thread-have-younger-brother-str "+")
(setq wl-thread-youngest-child-str       "+")
(setq wl-thread-vertical-str             "|")
(setq wl-thread-horizontal-str           "-")
(setq wl-thread-space-str                " ")
@end group
@end lisp

If you do not want to see branches, do the following:

@lisp
@group
(setq wl-thread-indent-level 2)
(setq wl-thread-have-younger-brother-str " ")
(setq wl-thread-youngest-child-str       " ")
(setq wl-thread-vertical-str             " ")
(setq wl-thread-horizontal-str           " ")
(setq wl-thread-space-str                " ")
@end group
@end lisp


@node User-Agent Field,  , Thread Format, Advanced Settings
@subsection User-Agent Field
@cindex X-Mailer
@cindex User-Agent

If you are eccentric enough to elaborate @samp{X-Mailer:} or
@samp{User-Agent:} fields, define a function that generate appropriate
strings as you like, and set it to variable
@code{wl-generate-mailer-string-func}.

If you do not want verbose @samp{User-Agent:} field, do the following:

@lisp
@group
(setq wl-generate-mailer-string-func
      (function
       (lambda ()
         (concat "User-Agent: "
                 (wl-generate-user-agent-string-1 nil)))))
@end group
@end lisp

The following is a example:

@lisp
@group
(setq mime-edit-insert-user-agent-field nil)
(setq wl-generate-mailer-string-func
      (function
       (lambda ()
         (format "X-Mailer: %s" (product-string-1 'wl-version)))))
@end group
@end lisp


@node Customizable Variables, Hooks, Advanced Settings, Customization
@section Customizable Variables

Customizable variables that have not been described yet:

@table @code
@item wl-default-folder
@vindex wl-default-folder
The initial setting is @samp{%inbox}.  This is the default value for moving to
a folder and the like.

@item wl-draft-folder
@vindex wl-draft-folder
The initial setting is @samp{+draft}.  It is the folder to which drafts are
saved.  It must be a localdir folder.

@item wl-trash-folder
@vindex wl-trash-folder
The initial setting is @samp{+trash}.  It is the wastebasket folder.
If you changed this variable, you had better restart Wanderlust.

@item wl-interactive-exit
@vindex wl-interactive-exit
The initial setting is @code{t}.
If non-nil, you are asked for confirmation when Wanderlust terminates.

@item wl-interactive-send
@vindex wl-interactive-send
The initial setting is @code{nil}.
If non-nil, you are asked for confirmation when mail is sent.

@item wl-folder-sync-range-alist
@vindex wl-folder-sync-range-alist
The initial setting is the alist shown below:

@lisp
@group
(("^&.*$" . "all")
 ("^\\+draft$\\|^\\+queue$" . "all"))
@end group
@end lisp

@noindent
This is an associative list of regular expressions of folder names and
update range of the summary.  Update range is one of the @samp{all},
@samp{update}, @samp{rescan}, @samp{rescan-noscore}, @samp{first} and
@samp{last}. If a folder do not match, @samp{update} is used.

@item wl-ask-range
@vindex wl-ask-range
The initial setting is @code{t}.
If @code{nil}, the value of @code{wl-folder-sync-range-alist} is used
for updating the summary when you changed folders.

@item wl-mime-charset
@vindex wl-mime-charset
The initial setting is @code{x-ctext}.
This is the MIME charset for messages that are not MIME (e.g. without
@samp{Content-Type:}). This value also used as default charset for
summary.  (If you want to share Summary on Nemacs and other Emacsen, set
this value as @code{iso-2022-jp}.)

@item wl-highlight-folder-with-icon
@vindex wl-highlight-folder-with-icon
This is meaningful for XEmacs or Emacs 21..  The initial setting depends
on Emacsen (@code{t} for XEmacs or Emacs 21 with icons).

@item wl-strict-diff-folders
@vindex wl-strict-diff-folders
This is a list of regular expressions of folders.
Unread messages are checked, for example when you press @kbd{s} in
the folder mode, usually in a brief way (rapidly processed but not
accurate).
The folders matching this variable are seriously checked.
You may want to set this variable so as to match conditional filter
folders for IMAP4 folders.
The initial setting is @code{nil}.

@item wl-folder-use-server-diff
@vindex wl-folder-use-server-diff
When unread messages are checked, for example when you press @kbd{s} in
the folder mode, usually (the number of messages on the server) @minus{}
(the number of local messages) will be the number of unread messages.
However, if this variable is non-nil, the number of unread messages on
the server is checked.  This affects IMAP4 folders only, but IMAP4
folders in mail boxes matching
@code{elmo-imap4-disuse-server-flag-mailbox-regexp} are not checked for
the number of unread messages on the server, even if they matches this
variable.  The initial setting is @code{t}.

@item wl-auto-check-folder-name
@vindex wl-auto-check-folder-name
The initial setting is @code{nil}.
If non-nil, the folder with the name of the value is checked for unread
messages at the start.
If it is @code{none}, no folders are checked.
If it is a list, all folders in the list are checked at the start.

@item wl-auto-uncheck-folder-list
@vindex wl-auto-uncheck-folder-list
The initial setting is the list shown below:

@lisp
@group
("\\$.*")
@end group
@end lisp

@noindent
Folders with the name matching this variable are not checked for unread
messages at the start, even if they are included in the groups in
@code{wl-auto-check-folder-name}.

@item wl-auto-check-folder-list
@vindex wl-auto-check-folder-list
The initial setting is @code{nil}.
Folders with the name matching this variable are always checked for
unread messages at the start, if they are included in the groups in
@code{wl-auto-check-folder-name}.
This takes precedence over @code{wl-auto-uncheck-folder-list}.

@item wl-no-save-folder-list
@vindex wl-no-save-folder-list
The initial setting is the list shown below:

@lisp
@group
("^/.*$")
@end group
@end lisp

@noindent
This is a list of regular expressions of folders not to be saved.

@item wl-save-folder-list
@vindex wl-save-folder-list
The initial setting is @code{nil}.
This is a list of regular expressions of folders to be saved.
This takes precedence over @code{wl-no-save-folder-list}.

@item wl-folder-mime-charset-alist
@vindex wl-folder-mime-charset-alist
The initial setting is the alist shown below:

@lisp
@group
(("^-alt\\.chinese" . big5)
 ("^-relcom\\." . koi8-r)
 ("^-tw\\." . big5)
 ("^-han\\." . euc-kr))
@end group
@end lisp

@noindent
This is an associative list of regular expressions of folder names and
MIME charsets.
If a folder do not match, @code{wl-mime-charset} is used.

@item wl-folder-init-load-access-folders
@vindex wl-folder-init-load-access-folders
The initial setting is @code{nil}.
This is a list of access groups to be loaded specifically at the start.
If it is @code{nil}, @code{wl-folder-init-no-load-access-folders} is referred.

@item wl-folder-init-no-load-access-folders
@vindex wl-folder-init-no-load-access-folders
The initial setting is @code{nil}.
This is a list of access groups not to be loaded specifically at the
start.
It is ignored if @code{wl-folder-init-load-access-folders} is non-nil.

@item wl-delete-folder-alist
@vindex wl-delete-folder-alist
The initial setting is the alist shown below:

@lisp
@group
(("^-" . remove))
@end group
@end lisp

@noindent
This list determines disposition of messages with delete marks.
Each item in the list is a folder and destination; you can specify any
one of the following in the place of destination:

@example
@code{remove} or @code{null} : deletes the messages instantly.
string             : moves the messages to the specific folder.
@code{trash} or others  : moves the messages to @code{wl-trash-folder}.
@end example

@item wl-refile-policy-alist
@vindex wl-refile-policy-alist
The initial setting is the list shown below:

@lisp
@group
(("^[-=]" . copy)
 (".*" . move))
@end group
@end lisp

@noindent
This list determines whether messages with re-file marks are moved or
copied.  Each item in the list is a cons cell of a folder and
@code{copy} or @code{move}.

@item wl-x-face-file
@vindex wl-x-face-file
The initial setting is @file{~/.xface}.
The name of the file that contains encoded X-Face strings.
@xref{x-face-mule}.

@item wl-demo-display-logo
@vindex wl-demo-display-logo
If non-nil, bitmap image is shown on the opening demo.  If you set
@code{xpm} or @code{xbm}, (if possible) display selected image type
logo.

@item elmo-use-database
@vindex  elmo-use-database
This is meaningful for XEmacs only.  The initial setting depends on
XEmacs (@code{t} for XEmacs with dbm).
If non-nil, Message-ID is controlled by dbm.

@item elmo-passwd-alist-file-name
@vindex elmo-passwd-alist-file-name
The initial setting is @file{passwd}.
This is the name of the file in which passwords are saved.
@code{elmo-passwd-alist-save} saves current passwords to the file.

@item elmo-nntp-list-folders-use-cache
@vindex elmo-nntp-list-folders-use-cache
The initial setting is 600 (in seconds).
This is period in seconds during which results of @samp{list} and
@samp{list active} in NNTP are cached.  If it is @code{nil}, they are
not cached.

@item elmo-nntp-max-number-precedes-list-active
@vindex elmo-nntp-max-number-precedes-list-active
The initial setting is @code{nil}.
If non-nil, the number of article obtained by @samp{list active} in NNTP
are used as the maximum article number of the folder.
Set this to @code{t} if you are using for example INN 2.3 as an NNTP server,
and if the number of read messages is not correct.

@item elmo-nntp-default-use-listgroup
@vindex elmo-nntp-default-use-listgroup
The initial setting is @code{t}.
If non-nil, @samp{listgroup} is used for checking the total number of
articles.  If it is @code{nil}, @samp{group} is used.  In the latter
case, the processing will be a little faster at the sacrifice of
accuracy.

@item elmo-pop3-send-command-synchronously
@vindex elmo-pop3-send-command-synchronously
The initial setting is @code{nil}.
If non-nil, POP3 commands are issued synchronously.  Some implementation
of POP3 server fails to get summary information without this setting.
You may have to set this variable to @code{t}, if the process hangs
while looking up POP3.

@item elmo-dop-flush-confirm
@vindex elmo-dop-flush-confirm
The initial setting is @code{t}.
If non-nil, you are asked for confirmation if accumulated off-line
operations are executed.

@item elmo-display-progress-threshold
@vindex elmo-display-progress-threshold
The initial setting is 20.
Threshold for display of progress gauge.  If number of renewal is more than
this value, display progress gauge.
@end table


@node Hooks,  , Customizable Variables, Customization
@section Hooks

(Not yet written)


@node Mailing List, Addition, Customization, Top
@chapter Wanderlust Mailing List
@cindex Bug report
@cindex Backtrace

@display
Wanderlust Mailing List @t{<wl@@lists.airs.net>}
@end display

Topics related to Wanderlust are discussed in the mailing list.
The latest version is also announced there (in Japanese, sorry).

A guide can be obtained automatically by sending mail to
@t{wl-ctl@@lists.airs.net} with the body

@example
# guide
@end example
Please send bug reports or patches to the mailing list.  You can post to
the mailing list even though you are not a member of it.

If you send a bug report, please attach Backtrace with it.
@footnote{@uref{http://www.jpl.org/elips/BUGS-ja.html} describes how to
in Japanese.}

I would like to express my thanks to the members of the mailing list for 
valuable advice and many pieces of code they contributed.


@node Addition, Index, Mailing List, Top
@chapter Additional Information

@section Brief History

@example
1998  3/05    Tried to make a prototype that displays MH messages in threads.
      3/10    Made a msgdb mechanism by elisp.
      3/26    IMAP and NNTP can be displayed in threads.
      4/13    Began to assemble thread display modules as elmo.
      5/01    Finished 0.1.0, initial version with many defects.
      6/12    I made a slip of the tongue and said I was writing elisp
              mailer supporting IMAP
      6/16    0.1.3 was announced at tm-ja, elisp ML.
      6/22    Thanks to Kitame-san, the mailing list started at northeye.org.
      7/01    Support for mm-backend (0.3.0).
      8/25    multi folder added (0.5.0).
      8/28    filter folder added (0.5.1).
      9/10    You can open/close threads (0.6.0).
      9/11    fldmgr by Murata-san made editing folders easy.
      9/18    lha folders added by Okunishi-san (0.6.3).
      9/24    Display of branches of threads (0.6.5).
      9/28    Compression folder supporting multiple archivers by Okunishi-san.
     10/28    Off-line operations (0.7.4).
     12/09    Becomes beta version.
     12/21    wl-expire by Murata-san.
1999  2/03    auto-refile by Tsumura-san.
      4/28    wl-template by Murata-san.
      5/18    Released 1.0.0 stable.
      7/05    Scoring by Murata-san (2.1.0).
      9/26    New plugged system by Murata-san (2.2.2).
     12/20    Support Modified UTF7.
2000  3/24    Released 1.1.0 stable.
      4/03    CVS development started.
      5/07    Thread restoration & Its speed up with Murata-san.
      6/12    Address completion with LDAP with Chiba-san & Goto-san.
      7/11    killed message feature.
      7/18    Use UIDL in POP3.
      9/12    biff feature with Satata-san & Yamaoka-san.
@end example

See @file{ChangeLog} for details.

@section The Name

According to a dictionary, Wanderlust has the meaning:

@display
wanderlust
  n eager longing for or impulse towards travelling in distant lands
  [Ger, fr wandern to wander + lust desire, pleasure]
@end display

@noindent
but I had no profound intention.  (if farfetched, IMAP @result{} you can
read mail anywhere @result{} desire to wander ?)

Elmo is the abbreviation of @samp{Elisp Library for Message
Orchestration}.  At first I meant the red puppet in the Sesame Street,
but you may associate it with Wandering @result{} Drifting @result{}
Guidepost @result{} St.@: Elmo's fire @result{} elmo.

@section Code Names

Each versions has code names (they are almost jokes).
Currently they are picked up alphabetically from the top 40 hits of
U.S. Billboard magazines in 1980s.

(@uref{http://lyrics.natalnet.com.br/html/top40/index.html})


@node Index,  , Addition, Top
@unnumbered Index

@menu
* Concept Index::               Concept Index
* Key Index::                   Key Index
* Variable Index::              Variable Index
* Function Index::              Function Index
@end menu

@node Concept Index, Key Index, Index, Index
@unnumberedsec Concept Index
@printindex cp

@node Key Index, Variable Index, Concept Index, Index
@unnumberedsec Key Index
@printindex ky

@node Variable Index, Function Index, Key Index, Index
@unnumberedsec Variable Index
@printindex vr

@node Function Index,  , Variable Index, Index
@unnumberedsec Function Index
@printindex fn

@summarycontents
@contents
@bye

@c Local Variables: 
@c fill-column: 72
@c End: