1 ;;; pop3.el --- Post Office Protocol (RFC 1460) interface
3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001
4 ;; Free Software Foundation, Inc.
6 ;; Author: Richard L. Pieri <ratinox@peorth.gweep.net>
7 ;; Daiki Ueno <ueno@ueda.info.waseda.ac.jp>
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software; you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation; either version 2, or (at your option)
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 ;; Boston, MA 02111-1307, USA.
30 ;; Most of the standard Post Office Protocol version 3 (RFC 1460) commands
31 ;; are implemented. The LIST command has not been implemented due to lack
32 ;; of actual usefulness.
33 ;; The optional POP3 command TOP has not been implemented.
35 ;; This program was inspired by Kyle E. Jones's vm-pop program.
39 (eval-when-compile (require 'cl))
40 (eval-when-compile (require 'static))
44 (defvar pop3-maildrop (or (user-login-name) (getenv "LOGNAME") (getenv "USER") nil)
46 (defvar pop3-mailhost (or (getenv "MAILHOST") nil)
50 (defvar pop3-connection-type nil
51 "*POP3 connection type.")
53 (defvar pop3-password-required t
54 "*Non-nil if a password is required when connecting to POP server.")
55 (defvar pop3-password nil
56 "*Password to use when connecting to POP server.")
58 (defvar pop3-authentication-scheme 'pass
59 "*POP3 authentication scheme.
60 Defaults to 'pass, for the standard USER/PASS authentication. Other valid
63 (defvar pop3-timestamp nil
64 "Timestamp returned when initially connected to the POP server.
65 Used for APOP authentication.")
67 (defvar pop3-leave-mail-on-server nil
68 "Non-nil if mail is to be left on the server and UIDL used for message retrieval.")
70 (defvar pop3-maximum-message-size nil
71 "If non-nil only download messages smaller than this.")
73 (defvar pop3-except-header-regexp nil
74 "If non-nil we do not retrieve messages whose headers are matching this regexp.")
76 (defvar pop3-uidl-file-name "~/.uidls"
77 "File in which to store the UIDL of processed messages.")
79 (defvar pop3-uidl-support 'dont-know
80 "Whether the server supports UIDL.
81 Nil means no, t means yes, not-nil-or-t means yet to be determined.")
83 (defvar pop3-uidl-obarray (make-vector 31 0)
86 (defvar pop3-read-point nil)
87 (defvar pop3-debug nil)
90 (autoload 'open-ssl-stream "ssl")
91 (autoload 'starttls-open-stream "starttls")
92 (autoload 'starttls-negotiate "starttls"))
94 (defvar pop3-ssl-program-name
95 (if (exec-installed-p "openssl")
98 "The program to run in a subprocess to open an SSL connection.")
100 (defvar pop3-ssl-program-arguments
101 '("s_client" "-quiet")
102 "Arguments to be passed to the program `pop3-ssl-program-name'.")
104 (defun pop3-progress-message (format percent &rest args)
105 (apply (function message) format args))
107 (defun pop3-movemail (&optional crashbox)
108 "Transfer contents of a maildrop to the specified CRASHBOX."
109 (or crashbox (setq crashbox (expand-file-name "~/.crashbox")))
110 (let* ((process (pop3-open-server pop3-mailhost pop3-port))
111 (crashbuf (get-buffer-create " *pop3-retr*"))
114 (pop3-password pop3-password)
115 (pop3-uidl-file-name (convert-standard-filename
116 (concat pop3-uidl-file-name "-"
118 retrieved-messages messages)
119 ;; for debugging only
120 (if pop3-debug (switch-to-buffer (process-buffer process)))
121 ;; query for password
122 (if (and pop3-password-required (not pop3-password))
124 (pop3-read-passwd (format "Password for %s: " pop3-maildrop))))
125 (cond ((equal 'apop pop3-authentication-scheme)
126 (pop3-apop process pop3-maildrop))
127 ((equal 'pass pop3-authentication-scheme)
128 (pop3-user process pop3-maildrop)
130 (t (error "Invalid POP3 authentication scheme")))
131 ;; get messages that are suitable for download
132 (message "Retrieving message list...")
133 (setq messages (pop3-get-message-numbers process)
134 message-count (length (cdr messages)))
135 (message "Retrieving message list...%d of %d unread"
136 message-count (pop messages))
138 (unless (not (stringp crashbox))
140 (pop3-progress-message
141 "Retrieving message %d of %d (%d octets) from %s..."
142 (floor (* (/ (float n) message-count) 100))
143 n message-count (cdar messages) pop3-mailhost)
144 (pop3-retr process (caar messages) crashbuf)
145 (push (caar messages) retrieved-messages)
146 (setq messages (cdr messages)
148 (with-current-buffer crashbuf
149 (write-region-as-binary (point-min) (point-max)
150 crashbox 'append 'nomesg))
151 ;; mark messages as read
152 (when pop3-leave-mail-on-server
154 ;; now delete the messages we have retrieved
155 (unless pop3-leave-mail-on-server
156 (dolist (n retrieved-messages)
157 (message "Deleting message %d of %d from %s..."
158 n message-count pop3-mailhost)
159 (pop3-dele process n)))
162 (kill-buffer crashbuf)
165 (defun pop3-get-message-count ()
166 "Return the number of messages in the maildrop."
167 (let* ((process (pop3-open-server pop3-mailhost pop3-port))
169 (pop3-password pop3-password)
171 ;; for debugging only
172 (if pop3-debug (switch-to-buffer (process-buffer process)))
173 ;; query for password
174 (if (and pop3-password-required (not pop3-password))
176 (pop3-read-passwd (format "Password for %s: " pop3-maildrop))))
177 (cond ((equal 'apop pop3-authentication-scheme)
178 (pop3-apop process pop3-maildrop))
179 ((equal 'pass pop3-authentication-scheme)
180 (pop3-user process pop3-maildrop)
182 (t (error "Invalid POP3 authentication scheme.")))
183 (setq message-count (car (pop3-stat process)))
187 (defun pop3-open-server (mailhost port)
188 "Open TCP connection to MAILHOST on PORT.
189 Returns the process associated with the connection.
190 Argument PORT specifies connecting port."
193 (set-buffer (get-buffer-create (concat " trace of POP session to "
196 (setq pop3-read-point (point-min))
200 ((eq pop3-connection-type 'ssl)
201 (pop3-open-ssl-stream "POP" (current-buffer) mailhost port))
202 ((eq pop3-connection-type 'tls)
203 (pop3-open-tls-stream "POP" (current-buffer) mailhost port))
205 (open-network-stream-as-binary "POP" (current-buffer)
207 (let ((response (pop3-read-response process t)))
209 (substring response (or (string-match "<" response) 0)
210 (+ 1 (or (string-match ">" response) -1)))))
213 (defun pop3-open-ssl-stream-1 (name buffer host service extra-arg)
215 (let* ((ssl-program-name
216 pop3-ssl-program-name)
217 (ssl-program-arguments
218 `(,@pop3-ssl-program-arguments ,extra-arg
219 "-connect" ,(format "%s:%d" host service)))
220 (process (open-ssl-stream name buffer host service)))
222 (with-current-buffer buffer
223 (goto-char (point-min))
224 (while (and (memq (process-status process) '(open run))
225 (goto-char (point-max))
227 (not (looking-at "+OK")))
228 (accept-process-output process 1)
230 (delete-region (point-min) (point)))
231 (and process (memq (process-status process) '(open run))
234 (defun pop3-open-ssl-stream (name buffer host service)
235 "Open a SSL connection for a service to a host.
236 Returns a subprocess-object to represent the connection.
237 Args are NAME BUFFER HOST SERVICE."
238 (cond ((eq system-type 'windows-nt)
239 (let (selective-display
240 (coding-system-for-write 'binary)
241 (coding-system-for-read 'raw-text-dos))
242 (or (pop3-open-ssl-stream-1 name buffer host service "-ssl3")
243 (pop3-open-ssl-stream-1 name buffer host service "-ssl2"))))
246 (or (pop3-open-ssl-stream-1 name buffer host service "-ssl3")
247 (pop3-open-ssl-stream-1 name buffer host service "-ssl2"))))))
249 (defun pop3-open-tls-stream (name buffer host service)
250 "Open a TLSv1 connection for a service to a host.
251 Returns a subprocess-object to represent the connection.
252 Args are NAME BUFFER HOST SERVICE."
254 (as-binary-process (starttls-open-stream
255 name buffer host service))))
257 (starttls-negotiate process)
262 (defun pop3-process-filter (process output)
264 (set-buffer (process-buffer process))
265 (goto-char (point-max))
268 (defun pop3-send-command (process command)
269 (set-buffer (process-buffer process))
270 (goto-char (point-max))
271 ;; (if (= (aref command 0) ?P)
272 ;; (insert "PASS <omitted>\r\n")
273 ;; (insert command "\r\n"))
274 (setq pop3-read-point (point))
275 (goto-char (point-max))
276 (process-send-string process (concat command "\r\n"))
279 (defun pop3-read-response (process &optional return)
280 "Read the response from the server PROCESS.
281 Return the response string if optional second argument RETURN is non-nil."
282 (let ((case-fold-search nil)
285 (set-buffer (process-buffer process))
286 (goto-char pop3-read-point)
287 (while (not (search-forward "\r\n" nil t))
288 (accept-process-output process 3)
289 (goto-char pop3-read-point))
290 (setq match-end (point))
291 (goto-char pop3-read-point)
292 (if (looking-at "-ERR")
293 (error (buffer-substring (point) (- match-end 2)))
294 (if (not (looking-at "+OK"))
295 (progn (setq pop3-read-point match-end) nil)
296 (setq pop3-read-point match-end)
298 (buffer-substring (point) match-end)
302 (defvar pop3-read-passwd nil)
303 (defun pop3-read-passwd (prompt)
304 (if (not pop3-read-passwd)
305 (if (fboundp 'read-passwd)
306 (setq pop3-read-passwd 'read-passwd)
307 (if (load "passwd" t)
308 (setq pop3-read-passwd 'read-passwd)
309 (autoload 'ange-ftp-read-passwd "ange-ftp")
310 (setq pop3-read-passwd 'ange-ftp-read-passwd))))
311 (funcall pop3-read-passwd prompt))
313 (defun pop3-clean-region (start end)
314 (setq end (set-marker (make-marker) end))
317 (while (and (< (point) end) (search-forward "\r\n" end t))
318 (replace-match "\n" t t))
320 (while (re-search-forward "\n\n\\(From \\)" end t)
321 (replace-match "\n\n>\\1" t nil))
323 (while (and (< (point) end) (re-search-forward "^\\." end t))
324 (replace-match "" t t)
326 (set-marker end nil))
328 (eval-when-compile (defvar parse-time-months))
330 ;; Copied from message-make-date.
331 (defun pop3-make-date (&optional now)
332 "Make a valid date header.
333 If NOW, use that time instead."
334 (require 'parse-time)
335 (let* ((now (or now (current-time)))
336 (zone (nth 8 (decode-time now)))
340 (setq zone (- zone)))
342 (format-time-string "%d" now)
343 ;; The month name of the %b spec is locale-specific. Pfff.
345 (capitalize (car (rassoc (nth 4 (decode-time now))
346 parse-time-months))))
347 (format-time-string "%Y %H:%M:%S " now)
348 ;; We do all of this because XEmacs doesn't have the %z spec.
349 (format "%s%02d%02d" sign (/ zone 3600) (/ (% zone 3600) 60)))))
351 (defun pop3-munge-message-separator (start end)
352 "Check to see if a message separator exists. If not, generate one."
355 (narrow-to-region start end)
356 (goto-char (point-min))
357 (if (not (or (looking-at "From .?") ; Unix mail
358 (looking-at "\001\001\001\001\n") ; MMDF
359 (looking-at "BABYL OPTIONS:") ; Babyl
361 (let ((from (mail-strip-quoted-names (mail-fetch-field "From")))
362 (date (split-string (or (mail-fetch-field "Date")
366 ;; sample date formats I have seen
367 ;; Date: Tue, 9 Jul 1996 09:04:21 -0400 (EDT)
368 ;; Date: 08 Jul 1996 23:22:24 -0400
370 ;; Tue Jul 9 09:04:21 1996
372 (cond ((string-match "[A-Z]" (nth 0 date))
373 (format "%s %s %s %s %s"
374 (nth 0 date) (nth 2 date) (nth 1 date)
375 (nth 4 date) (nth 3 date)))
377 ;; this really needs to be better but I don't feel
378 ;; like writing a date to day converter.
379 (format "Sun %s %s %s %s"
380 (nth 1 date) (nth 0 date)
381 (nth 3 date) (nth 2 date)))
383 (setq From_ (format "\nFrom %s %s\n" from date))
384 (while (string-match "," From_)
385 (setq From_ (concat (substring From_ 0 (match-beginning 0))
386 (substring From_ (match-end 0)))))
387 (goto-char (point-min))
389 (if (search-forward "\n\n" nil t)
391 (goto-char (point-max))
393 (narrow-to-region (point) (point-max))
394 (let ((size (- (point-max) (point-min))))
395 (goto-char (point-min))
398 (insert (format "Content-Length: %s\n" size)))
403 (defun pop3-get-message-numbers (process)
404 "Get the list of message numbers and lengths to retrieve via PROCESS."
405 ;; we use the LIST comand first anyway to get the message lengths.
406 ;; then if we're leaving mail on the server, see if the UIDL command
407 ;; is implemented. if so, we use it to get the message number list.
408 (let* ((messages (pop3-list process))
409 (total (or (pop messages) 0))
410 (uidl (if pop3-leave-mail-on-server
411 (pop3-get-uidl process)))
414 ;; only retrieve messages matching our regexp or in the uidl list
416 ;; remove elements not in the uidl, this assumes the uidl is short
417 (or (not (eq pop3-uidl-support t))
418 (memq (caar messages) uidl))
420 ;; don't download messages that are too large
421 (not (and pop3-maximum-message-size
422 (> (cdar messages) pop3-maximum-message-size)))
423 (not (and pop3-except-header-regexp
424 (string-match pop3-except-header-regexp
425 (pop3-top process (caar messages) 0)))))
426 (push (car messages) out))
427 (setq messages (cdr messages)))
428 (cons total (reverse out))))
430 (defun pop3-get-uidl (process)
431 "Use PROCESS to get a list of unread message numbers."
432 (let ((messages (pop3-uidl process)) uidl)
433 (if (or (null messages) (null pop3-uidl-support))
434 (setq pop3-uidl-support nil)
435 (setq pop3-uidl-support t)
438 (when (file-readable-p pop3-uidl-file-name)
439 (insert-file-contents pop3-uidl-file-name))
440 (goto-char (point-min))
441 (while (looking-at "\\([^ \n\t]+\\)")
442 (set (intern (match-string 1) pop3-uidl-obarray)
446 (dolist (message (cdr messages))
447 (if (setq uidl (intern-soft (cdr message) pop3-uidl-obarray))
448 (setcar (symbol-value uidl) (car message))
449 (set (intern (cdr message) pop3-uidl-obarray)
450 (cons (car message) nil))))
451 (pop3-get-unread-message-numbers))
454 (defun pop3-get-unread-message-numbers ()
455 "Return a sorted list of unread msg numbers to retrieve."
457 (mapatoms (lambda (atom)
458 (if (not (cdr (symbol-value atom)))
459 (push (car (symbol-value atom)) nums)))
463 (defun pop3-save-uidls ()
464 "Save the updated UIDLs to disk for use next time."
465 (when (and pop3-leave-mail-on-server
466 ;; UIDL hash table is non-empty
467 (let ((len (length pop3-uidl-obarray)))
469 (setq len (if (symbolp (aref pop3-uidl-obarray (1- len)))
472 (when (file-readable-p pop3-uidl-file-name)
473 (copy-file pop3-uidl-file-name
474 (concat pop3-uidl-file-name ".old")
475 'overwrite 'keeptime))
477 (with-temp-file pop3-uidl-file-name
480 (when (car (symbol-value atom))
481 (insert (format "%s\n" atom))))
483 (fillarray pop3-uidl-obarray 0)))
488 ;; AUTHORIZATION STATE
490 (defun pop3-user (process user)
491 "Send USER information to POP3 server."
492 (pop3-send-command process (format "USER %s" user))
493 (let ((response (pop3-read-response process t)))
494 (if (not (and response (string-match "+OK" response)))
495 (error (format "USER %s not valid." user)))))
497 (defun pop3-pass (process)
498 "Send authentication information to the server."
499 (pop3-send-command process (format "PASS %s" pop3-password))
500 (let ((response (pop3-read-response process t)))
501 (if (not (and response (string-match "+OK" response)))
502 (pop3-quit process))))
504 (static-unless (and (fboundp 'md5) (subrp (symbol-function 'md5)))
507 (if (module-installed-p 'md5)
509 (autoload 'md5 "md5")
510 (fset 'pop3-md5 'md5))
512 (defvar pop3-md5-program "md5"
513 "*Program to encode its input in MD5.")
515 (defun pop3-md5 (string)
518 (call-process-region (point-min) (point-max)
519 (or shell-file-name "/bin/sh")
520 t (current-buffer) nil
521 "-c" pop3-md5-program)
522 ;; The meaningful output is the first 32 characters.
523 ;; Don't return the newline that follows them!
524 (buffer-substring (point-min) (+ (point-min) 32))))
527 (defun pop3-apop (process user)
528 "Send alternate authentication information to the server."
529 (let ((pass pop3-password))
530 (if (and pop3-password-required (not pass))
532 (pop3-read-passwd (format "Password for %s: " pop3-maildrop))))
534 (let ((hash (static-if (and (fboundp 'md5)
535 (subrp (symbol-function 'md5)))
536 (md5 (concat pop3-timestamp pass))
537 (pop3-md5 (concat pop3-timestamp pass)))))
538 (pop3-send-command process (format "APOP %s %s" user hash))
539 (let ((response (pop3-read-response process t)))
540 (if (not (and response (string-match "+OK" response)))
541 (pop3-quit process)))))
544 (defun pop3-stls (process)
545 "Query whether TLS extension is supported"
546 (pop3-send-command process "STLS")
547 (let ((response (pop3-read-response process t)))
548 (if (not (and response (string-match "+OK" response)))
549 (pop3-quit process))))
553 (defun pop3-stat (process)
554 "Return the number of messages in the maildrop and the maildrop's size."
555 (pop3-send-command process "STAT")
556 (let ((response (pop3-read-response process t)))
557 (list (string-to-int (nth 1 (split-string response " ")))
558 (string-to-int (nth 2 (split-string response " "))))
561 (defun pop3-retr (process msg crashbuf)
562 "Retrieve message-id MSG to buffer CRASHBUF."
563 (pop3-send-command process (format "RETR %s" msg))
564 (pop3-read-response process)
566 (let ((region (pop3-get-extended-response process)))
567 (pop3-munge-message-separator (car region) (cadr region))
568 (append-to-buffer crashbuf (car region) (cadr region))
569 (delete-region (car region) (cadr region))
572 (defun pop3-dele (process msg)
573 "Mark message-id MSG as deleted."
574 (pop3-send-command process (format "DELE %s" msg))
575 (pop3-read-response process))
577 (defun pop3-noop (process msg)
579 (pop3-send-command process "NOOP")
580 (pop3-read-response process))
582 (defun pop3-last (process)
583 "Return highest accessed message-id number for the session."
584 (pop3-send-command process "LAST")
585 (let ((response (pop3-read-response process t)))
586 (string-to-int (nth 1 (split-string response " ")))
589 (defun pop3-rset (process)
590 "Remove all delete marks from current maildrop."
591 (pop3-send-command process "RSET")
592 (pop3-read-response process))
596 (defun pop3-quit (process)
597 "Close connection to POP3 server.
598 Tell server to remove all messages marked as deleted, unlock the maildrop,
599 and close the connection."
600 (pop3-send-command process "QUIT")
601 (pop3-read-response process t)
604 (set-buffer (process-buffer process))
605 (goto-char (point-max))
606 (delete-process process))))
608 (defun pop3-uidl (process &optional msgno)
609 "Return the results of a UIDL command in PROCESS for optional MSGNO.
610 If UIDL is unsupported on this mail server or if msgno is invalid, return nil.
611 Otherwise, return a list in the form
613 (N (1 UIDL-1) (2 UIDL-2) ... (N UIDL-N))
617 N is an integer for the number of UIDLs returned (could be 0)
621 (pop3-send-command process (format "UIDL %d" msgno))
622 (pop3-send-command process "UIDL"))
624 (if (null (pop3-read-response process t))
625 nil ;; UIDL is not supported on this server
629 (apply 'narrow-to-region (pop3-get-extended-response process))
630 (goto-char (point-min))
631 (while (looking-at "\\([^ \n\t]*\\) \\([^ \n\t]*\\)")
632 (setq msgno (string-to-int (match-string 1))
633 uidl (match-string 2))
634 (push (cons msgno uidl) pairs)
635 (beginning-of-line 2))
636 (cons (length pairs) (nreverse pairs))
639 (defun pop3-list (process &optional msgno)
640 "Return the results of a LIST command for PROCESS and optional MSGNO.
641 If (optional) msgno is invalid, return nil. Otherwise, return a list
644 (N (1 LEN-1) (2 LEN-2) ... (N LEN-N))
648 N is an integer for the number of msg/len pairs (could be 0)
649 LEN-n is an integer."
651 (pop3-send-command process (format "LIST %d" msgno))
652 (pop3-send-command process "LIST"))
654 (if (null (pop3-read-response process t))
655 nil ;; MSGNO is not valid number
659 (apply 'narrow-to-region (pop3-get-extended-response process))
660 (goto-char (point-min))
661 (while (looking-at "\\([^ \n\t]*\\) \\([^ \n\t]*\\)")
662 (setq msgno (string-to-int (match-string 1))
663 len (string-to-int (match-string 2)))
664 (push (cons msgno len) pairs)
665 (beginning-of-line 2))
666 (cons (length pairs) (nreverse pairs))
669 (defun pop3-top (process msgno &optional lines)
670 "Return the top LINES of messages for PROCESS and MSGNO.
671 If msgno is invalid, return nil. Otherwise, return a string."
672 (pop3-send-command process (format "TOP %d %d" msgno (or lines 1)))
673 (if (pop3-read-response process t)
674 nil ;; MSGNO is not valid number
676 (apply 'buffer-substring (pop3-get-extended-response process)))
681 (defun pop3-get-extended-response (process)
682 "Get the extended pop3 response in the PROCESS buffer."
683 (let ((start pop3-read-point) end)
684 (set-buffer (process-buffer process))
686 (while (not (re-search-forward "^\\.\r\n" nil t))
687 (accept-process-output process 3)
689 (setq pop3-read-point (point-marker))
690 (goto-char (match-beginning 0))
691 (setq end (point-marker))
692 (pop3-clean-region start end)
696 ;; Summary of POP3 (Post Office Protocol version 3) commands and responses
698 ;;; AUTHORIZATION STATE
700 ;; Initial TCP connection
702 ;; Restrictions: none
703 ;; Possible responses:
704 ;; +OK [POP3 server ready]
707 ;; Arguments: a server specific user-id (required)
708 ;; Restrictions: authorization state [after unsuccessful USER or PASS
709 ;; Possible responses:
710 ;; +OK [valid user-id]
711 ;; -ERR [invalid user-id]
714 ;; Arguments: a server/user-id specific password (required)
715 ;; Restrictions: authorization state, after successful USER
716 ;; Possible responses:
717 ;; +OK [maildrop locked and ready]
718 ;; -ERR [invalid password]
719 ;; -ERR [unable to lock maildrop]
723 ;; Restrictions: authorization state
724 ;; Possible responses:
725 ;; +OK [negotiation is ready]
726 ;; -ERR [security layer is already active]
728 ;;; TRANSACTION STATE
732 ;; Restrictions: transaction state
733 ;; Possible responses:
734 ;; +OK nn mm [# of messages, size of maildrop]
737 ;; Arguments: a message-id (optional)
738 ;; Restrictions: transaction state; msg must not be deleted
739 ;; Possible responses:
740 ;; +OK [scan listing follows]
741 ;; -ERR [no such message]
744 ;; Arguments: a message-id (required), number of lines (optional)
745 ;; Restrictions: transaction state; msg must not be deleted
746 ;; Possible responses:
747 ;; +OK [partial message listing follows]
748 ;; -ERR [no such message]
751 ;; Arguments: a message-id (optional)
752 ;; Restrictions: transaction state; msg must not be deleted
753 ;; Possible responses:
754 ;; +OK [uidl listing follows]
755 ;; -ERR [no such message]
758 ;; Arguments: a message-id (required)
759 ;; Restrictions: transaction state; msg must not be deleted
760 ;; Possible responses:
761 ;; +OK [message contents follow]
762 ;; -ERR [no such message]
765 ;; Arguments: a message-id (required)
766 ;; Restrictions: transaction state; msg must not be deleted
767 ;; Possible responses:
768 ;; +OK [message deleted]
769 ;; -ERR [no such message]
773 ;; Restrictions: transaction state
774 ;; Possible responses:
779 ;; Restrictions: transaction state
780 ;; Possible responses:
781 ;; +OK nn [highest numbered message accessed]
785 ;; Restrictions: transaction state
786 ;; Possible responses:
787 ;; +OK [all delete marks removed]
793 ;; Restrictions: none
794 ;; Possible responses:
795 ;; +OK [TCP connection closed]
799 ;;; pop3.el ends here