--- /dev/null
+;;; smtp.el --- basic functions of SMTP protocol (RFC 821)
+
+;; Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
+
+;; Author: Tomoji Kagatani <kagatani@rbc.ncl.omron.co.jp>
+;; Maintainer: Brian D. Carlstrom <bdc@ai.mit.edu>
+;; ESMTP support: Simon Leinen <simon@switch.ch>
+;; Keywords: SMTP, mail
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(defgroup smtp nil
+ "SMTP protocol for sending mail."
+ :group 'mail)
+
+(defcustom smtp-default-server nil
+ "*Specify default SMTP server."
+ :type '(choice (const nil) string)
+ :group 'smtp)
+
+(defcustom smtp-server
+ (or (getenv "SMTPSERVER") smtp-default-server)
+ "*The name of the host running SMTP server."
+ :type '(choice (const nil) string)
+ :group 'smtp)
+
+(defcustom smtp-service 25
+ "*SMTP service port number. smtp or 25 ."
+ :type 'integer
+ :group 'smtp)
+
+(defcustom smtp-local-domain nil
+ "*Local domain name without a host name.
+If the function (system-name) returns the full internet address,
+don't define this value."
+ :type '(choice (const nil) string)
+ :group 'smtp)
+
+(defcustom smtp-debug-info nil
+ "*smtp debug info printout. messages and process buffer."
+ :type 'boolean
+ :group 'smtp)
+
+(defcustom smtp-coding-system 'binary
+ "*Coding-system for SMTP output."
+ :type 'coding-system
+ :group 'smtp)
+
+
+(defun smtp-fqdn ()
+ (if smtp-local-domain
+ (concat (system-name) "." smtp-local-domain)
+ (system-name)))
+
+(defun smtp-via-smtp (recipient smtp-text-buffer)
+ (let ((process nil)
+ (host smtp-server)
+ (port smtp-service)
+ response-code
+ greeting
+ process-buffer
+ (supported-extensions '())
+ (coding-system-for-read smtp-coding-system)
+ (coding-system-for-write smtp-coding-system))
+ (unwind-protect
+ (catch 'done
+ ;; get or create the trace buffer
+ (setq process-buffer
+ (get-buffer-create
+ (format "*trace of SMTP session to %s*" host)))
+
+ ;; clear the trace buffer of old output
+ (save-excursion
+ (set-buffer process-buffer)
+ (erase-buffer))
+
+ ;; open the connection to the server
+ (setq process (open-network-stream "SMTP" process-buffer host port))
+ (and (null process) (throw 'done nil))
+
+ ;; set the send-filter
+ (set-process-filter process 'smtp-process-filter)
+
+ (save-excursion
+ (set-buffer process-buffer)
+ (make-local-variable 'smtp-read-point)
+ (setq smtp-read-point (point-min))
+
+ (if (or (null (car (setq greeting (smtp-read-response process))))
+ (not (integerp (car greeting)))
+ (>= (car greeting) 400))
+ (throw 'done nil)
+ )
+
+ ;; EHLO
+ (smtp-send-command process (format "EHLO %s" (smtp-fqdn)))
+
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (progn
+ ;; HELO
+ (smtp-send-command process (format "HELO %s" (smtp-fqdn)))
+
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil)))
+ (let ((extension-lines (cdr (cdr response-code))))
+ (while extension-lines
+ (let ((name (intern (downcase (substring (car extension-lines) 4)))))
+ (and name
+ (cond ((memq name '(verb xvrb 8bitmime onex xone
+ expn size dsn etrn
+ help xusr))
+ (setq supported-extensions
+ (cons name supported-extensions)))
+ (t (message "unknown extension %s"
+ name)))))
+ (setq extension-lines (cdr extension-lines)))))
+
+ (if (or (member 'onex supported-extensions)
+ (member 'xone supported-extensions))
+ (progn
+ (smtp-send-command process (format "ONEX"))
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil))))
+
+ (if (and smtp-debug-info
+ (or (member 'verb supported-extensions)
+ (member 'xvrb supported-extensions)))
+ (progn
+ (smtp-send-command process (format "VERB"))
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil))))
+
+ (if (member 'xusr supported-extensions)
+ (progn
+ (smtp-send-command process (format "XUSR"))
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil))))
+
+ ;; MAIL FROM: <sender>
+ (let ((size-part
+ (if (member 'size supported-extensions)
+ (format " SIZE=%d"
+ (save-excursion
+ (set-buffer smtp-text-buffer)
+ ;; size estimate:
+ (+ (- (point-max) (point-min))
+ ;; Add one byte for each change-of-line
+ ;; because or CR-LF representation:
+ (count-lines (point-min) (point-max))
+ ;; For some reason, an empty line is
+ ;; added to the message. Maybe this
+ ;; is a bug, but it can't hurt to add
+ ;; those two bytes anyway:
+ 2)))
+ ""))
+ (body-part
+ (if (member '8bitmime supported-extensions)
+ ;; FIXME:
+ ;; Code should be added here that transforms
+ ;; the contents of the message buffer into
+ ;; something the receiving SMTP can handle.
+ ;; For a receiver that supports 8BITMIME, this
+ ;; may mean converting BINARY to BASE64, or
+ ;; adding Content-Transfer-Encoding and the
+ ;; other MIME headers. The code should also
+ ;; return an indication of what encoding the
+ ;; message buffer is now, i.e. ASCII or
+ ;; 8BITMIME.
+ (if nil
+ " BODY=8BITMIME"
+ "")
+ "")))
+; (smtp-send-command process (format "MAIL FROM:%s@%s" (user-login-name) (smtp-fqdn)))
+ (smtp-send-command process (format "MAIL FROM: <%s>%s%s"
+ user-mail-address
+ size-part
+ body-part))
+
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil)
+ ))
+
+ ;; RCPT TO: <recipient>
+ (let ((n 0))
+ (while (not (null (nth n recipient)))
+ (smtp-send-command process (format "RCPT TO: <%s>" (nth n recipient)))
+ (setq n (1+ n))
+
+ (setq response-code (smtp-read-response process))
+ (if (or (null (car response-code))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil)
+ )
+ ))
+
+ ;; DATA
+ (smtp-send-command process "DATA")
+
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil)
+ )
+
+ ;; Mail contents
+ (smtp-send-data process smtp-text-buffer)
+
+ ;;DATA end "."
+ (smtp-send-command process ".")
+
+ (if (or (null (car (setq response-code (smtp-read-response process))))
+ (not (integerp (car response-code)))
+ (>= (car response-code) 400))
+ (throw 'done nil)
+ )
+
+ ;;QUIT
+; (smtp-send-command process "QUIT")
+; (and (null (car (smtp-read-response process)))
+; (throw 'done nil))
+ t ))
+ (if process
+ (save-excursion
+ (set-buffer (process-buffer process))
+ (smtp-send-command process "QUIT")
+ (smtp-read-response process)
+
+; (if (or (null (car (setq response-code (smtp-read-response process))))
+; (not (integerp (car response-code)))
+; (>= (car response-code) 400))
+; (throw 'done nil)
+; )
+ (delete-process process))))))
+
+(defun smtp-process-filter (process output)
+ (save-excursion
+ (set-buffer (process-buffer process))
+ (goto-char (point-max))
+ (insert output)))
+
+(defun smtp-read-response (process)
+ (let ((case-fold-search nil)
+ (response-strings nil)
+ (response-continue t)
+ (return-value '(nil ()))
+ match-end)
+
+ (while response-continue
+ (goto-char smtp-read-point)
+ (while (not (search-forward "\r\n" nil t))
+ (accept-process-output process)
+ (goto-char smtp-read-point))
+
+ (setq match-end (point))
+ (setq response-strings
+ (cons (buffer-substring smtp-read-point (- match-end 2))
+ response-strings))
+
+ (goto-char smtp-read-point)
+ (if (looking-at "[0-9]+ ")
+ (let ((begin (match-beginning 0))
+ (end (match-end 0)))
+ (if smtp-debug-info
+ (message "%s" (car response-strings)))
+
+ (setq smtp-read-point match-end)
+
+ ;; ignore lines that start with "0"
+ (if (looking-at "0[0-9]+ ")
+ nil
+ (setq response-continue nil)
+ (setq return-value
+ (cons (string-to-int
+ (buffer-substring begin end))
+ (nreverse response-strings)))))
+
+ (if (looking-at "[0-9]+-")
+ (progn (if smtp-debug-info
+ (message "%s" (car response-strings)))
+ (setq smtp-read-point match-end)
+ (setq response-continue t))
+ (progn
+ (setq smtp-read-point match-end)
+ (setq response-continue nil)
+ (setq return-value
+ (cons nil (nreverse response-strings)))
+ )
+ )))
+ (setq smtp-read-point match-end)
+ return-value))
+
+(defun smtp-send-command (process command)
+ (goto-char (point-max))
+ (if (= (aref command 0) ?P)
+ (insert "PASS <omitted>\r\n")
+ (insert command "\r\n"))
+ (setq smtp-read-point (point))
+ (process-send-string process command)
+ (process-send-string process "\r\n"))
+
+(defun smtp-send-data-1 (process data)
+ (goto-char (point-max))
+
+ (if smtp-debug-info
+ (insert data "\r\n"))
+
+ (setq smtp-read-point (point))
+ ;; Escape "." at start of a line
+ (if (eq (string-to-char data) ?.)
+ (process-send-string process "."))
+ (process-send-string process data)
+ (process-send-string process "\r\n")
+ )
+
+(defun smtp-send-data (process buffer)
+ (let
+ ((data-continue t)
+ (sending-data nil)
+ this-line
+ this-line-end)
+
+ (save-excursion
+ (set-buffer buffer)
+ (goto-char (point-min)))
+
+ (while data-continue
+ (save-excursion
+ (set-buffer buffer)
+ (beginning-of-line)
+ (setq this-line (point))
+ (end-of-line)
+ (setq this-line-end (point))
+ (setq sending-data nil)
+ (setq sending-data (buffer-substring this-line this-line-end))
+ (if (/= (forward-line 1) 0)
+ (setq data-continue nil)))
+
+ (smtp-send-data-1 process sending-data)
+ )
+ )
+ )
+
+(defun smtp-deduce-address-list (smtp-text-buffer header-start header-end)
+ "Get address list suitable for smtp RCPT TO: <address>."
+ (require 'mail-utils) ;; pick up mail-strip-quoted-names
+ (let ((case-fold-search t)
+ (simple-address-list "")
+ this-line
+ this-line-end
+ addr-regexp)
+
+ (unwind-protect
+ (save-excursion
+ ;;
+ (set-buffer smtp-address-buffer) (erase-buffer)
+ (insert-buffer-substring smtp-text-buffer
+ header-start header-end)
+ (goto-char (point-min))
+ ;; RESENT-* fields should stop processing of regular fields.
+ (save-excursion
+ (if (re-search-forward "^RESENT-TO:" header-end t)
+ (setq addr-regexp "^\\(RESENT-TO:\\|RESENT-CC:\\|RESENT-BCC:\\)")
+ (setq addr-regexp "^\\(TO:\\|CC:\\|BCC:\\)")))
+
+ (while (re-search-forward addr-regexp header-end t)
+ (replace-match "")
+ (setq this-line (match-beginning 0))
+ (forward-line 1)
+ ;; get any continuation lines
+ (while (and (looking-at "^[ \t]+") (< (point) header-end))
+ (forward-line 1))
+ (setq this-line-end (point-marker))
+ (setq simple-address-list
+ (concat simple-address-list " "
+ (mail-strip-quoted-names (buffer-substring this-line this-line-end))))
+ )
+ (erase-buffer)
+ (insert-string " ")
+ (insert-string simple-address-list)
+ (insert-string "\n")
+ (subst-char-in-region (point-min) (point-max) 10 ? t);; newline --> blank
+ (subst-char-in-region (point-min) (point-max) ?, ? t);; comma --> blank
+ (subst-char-in-region (point-min) (point-max) 9 ? t);; tab --> blank
+
+ (goto-char (point-min))
+ ;; tidyness in case hook is not robust when it looks at this
+ (while (re-search-forward "[ \t]+" header-end t) (replace-match " "))
+
+ (goto-char (point-min))
+ (let (recipient-address-list)
+ (while (re-search-forward " \\([^ ]+\\) " (point-max) t)
+ (backward-char 1)
+ (setq recipient-address-list (cons (buffer-substring (match-beginning 1) (match-end 1))
+ recipient-address-list))
+ )
+ (setq smtp-recipient-address-list recipient-address-list))
+
+ )
+ )
+ )
+ )
+
+(defun smtp-do-bcc (header-end)
+ "Delete BCC: and their continuation lines from the header area.
+There may be multiple BCC: lines, and each may have arbitrarily
+many continuation lines."
+ (let ((case-fold-search t))
+ (save-excursion
+ (goto-char (point-min))
+ ;; iterate over all BCC: lines
+ (while (re-search-forward "^BCC:" header-end t)
+ (delete-region (match-beginning 0) (progn (forward-line 1) (point)))
+ ;; get rid of any continuation lines
+ (while (and (looking-at "^[ \t].*\n") (< (point) header-end))
+ (replace-match ""))
+ )
+ ) ;; save-excursion
+ ) ;; let
+ )
+
+(provide 'smtp)
+
+;;; smtp.el ends here
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