1 ;;; smtpmail.el --- simple SMTP protocol (RFC 821) for sending mail
2 ;;; ### Hacked by Mike Taylor, 11th October 1999 to add support for
3 ;;; automatically appending a domain to RCPT TO: addresses.
5 ;; Copyright (C) 1995, 1996, 2001 Free Software Foundation, Inc.
7 ;; Author: Tomoji Kagatani <kagatani@rbc.ncl.omron.co.jp>
8 ;; Maintainer: Brian D. Carlstrom <bdc@ai.mit.edu>
9 ;; ESMTP support: Simon Leinen <simon@switch.ch>
12 ;; This file is part of GNU Emacs.
14 ;; GNU Emacs is free software; you can redistribute it and/or modify
15 ;; it under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation; either version 2, or (at your option)
19 ;; GNU Emacs is distributed in the hope that it will be useful,
20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 ;; GNU General Public License for more details.
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with GNU Emacs; see the file COPYING. If not, write to the
26 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
27 ;; Boston, MA 02111-1307, USA.
31 ;; Send Mail to smtp host from smtpmail temp buffer.
33 ;; Please add these lines in your .emacs(_emacs) or use customize.
35 ;;(setq send-mail-function 'smtpmail-send-it) ; if you use `mail'
36 ;;(setq message-send-mail-function 'smtpmail-send-it) ; if you use `message'
37 ;;(setq smtpmail-default-smtp-server "YOUR SMTP HOST")
38 ;;(setq smtpmail-local-domain "YOUR DOMAIN NAME")
39 ;;(setq smtpmail-sendto-domain "YOUR DOMAIN NAME")
40 ;;(setq smtpmail-debug-info t) ; only to debug problems
42 ;; To queue mail, set smtpmail-queue-mail to t and use
43 ;; smtpmail-send-queued-mail to send.
52 (defgroup smtpmail nil
53 "SMTP protocol for sending mail."
57 (defcustom smtpmail-default-smtp-server nil
58 "*Specify default SMTP server."
59 :type '(choice (const nil) string)
62 (defcustom smtpmail-smtp-server
63 (or (getenv "SMTPSERVER") smtpmail-default-smtp-server)
64 "*The name of the host running SMTP server."
65 :type '(choice (const nil) string)
68 (defcustom smtpmail-smtp-service 25
69 "*SMTP service port number. smtp or 25 ."
73 (defcustom smtpmail-local-domain nil
74 "*Local domain name without a host name.
75 If the function (system-name) returns the full internet address,
76 don't define this value."
77 :type '(choice (const nil) string)
80 (defcustom smtpmail-sendto-domain nil
81 "*Local domain name without a host name.
82 This is appended (with an @-sign) to any specified recipients which do
83 not include an @-sign, so that each RCPT TO address is fully qualified.
84 \(Some configurations of sendmail require this.)
86 Don't bother to set this unless you have get an error like:
87 Sending failed; SMTP protocol error
88 when sending mail, and the *trace of SMTP session to <somewhere>*
89 buffer includes an exchange like:
91 501 <someone>: recipient address must contain a domain
93 :type '(choice (const nil) string)
96 (defun maybe-append-domain (recipient)
97 (if (or (not smtpmail-sendto-domain)
98 (string-match "@" recipient))
100 (concat recipient "@" smtpmail-sendto-domain)))
102 (defcustom smtpmail-debug-info nil
103 "*smtpmail debug info printout. messages and process buffer."
107 (defcustom smtpmail-code-conv-from nil ;; *junet*
108 "*smtpmail code convert from this code to *internal*..for tiny-mime.."
112 (defcustom smtpmail-queue-mail nil
113 "*Specify if mail is queued (if t) or sent immediately (if nil).
114 If queued, it is stored in the directory `smtpmail-queue-dir'
115 and sent with `smtpmail-send-queued-mail'."
119 (defcustom smtpmail-queue-dir "~/Mail/queued-mail/"
120 "*Directory where `smtpmail.el' stores queued mail."
124 (defcustom smtpmail-warn-about-unknown-extensions nil
125 "*If set, print warnings about unknown SMTP extensions.
126 This is mainly useful for development purposes, to learn about
127 new SMTP extensions that might be useful to support."
132 (defvar smtpmail-queue-index-file "index"
133 "File name of queued mail index,
134 This is relative to `smtpmail-queue-dir'.")
136 (defvar smtpmail-address-buffer)
137 (defvar smtpmail-recipient-address-list)
139 ;; Buffer-local variable.
140 (defvar smtpmail-read-point)
142 (defvar smtpmail-queue-index (concat smtpmail-queue-dir
143 smtpmail-queue-index-file))
150 (defun smtpmail-send-it ()
151 (require 'mail-utils)
152 (let ((errbuf (if mail-interactive
153 (generate-new-buffer " smtpmail errors")
155 (tembuf (generate-new-buffer " smtpmail temp"))
156 (case-fold-search nil)
158 (mailbuf (current-buffer))
159 (smtpmail-code-conv-from
160 (if enable-multibyte-characters
161 (let ((sendmail-coding-system smtpmail-code-conv-from))
162 (select-message-coding-system)))))
167 (insert-buffer-substring mailbuf)
168 (goto-char (point-max))
169 ;; require one newline at the end.
170 (or (= (preceding-char) ?\n)
172 ;; Change header-delimiter to be what sendmail expects.
173 (mail-sendmail-undelimit-header)
174 (setq delimline (point-marker))
175 ;; (sendmail-synch-aliases)
177 (expand-mail-aliases (point-min) delimline))
178 (goto-char (point-min))
179 ;; ignore any blank lines in the header
180 (while (and (re-search-forward "\n\n\n*" delimline t)
181 (< (point) delimline))
182 (replace-match "\n"))
183 (let ((case-fold-search t))
184 ;; We used to process Resent-... headers here,
185 ;; but it was not done properly, and the job
186 ;; is done correctly in smtpmail-deduce-address-list.
187 ;; Don't send out a blank subject line
188 (goto-char (point-min))
189 (if (re-search-forward "^Subject:\\([ \t]*\n\\)+\\b" delimline t)
191 ;; This one matches a Subject just before the header delimiter.
192 (if (and (re-search-forward "^Subject:\\([ \t]*\n\\)+" delimline t)
193 (= (match-end 0) delimline))
195 ;; Put the "From:" field in unless for some odd reason
196 ;; they put one in themselves.
197 (goto-char (point-min))
198 (if (not (re-search-forward "^From:" delimline t))
199 (let* ((login user-mail-address)
200 (fullname (user-full-name)))
201 (cond ((eq mail-from-style 'angles)
202 (insert "From: " fullname)
203 (let ((fullname-start (+ (point-min) 6))
204 (fullname-end (point-marker)))
205 (goto-char fullname-start)
206 ;; Look for a character that cannot appear unquoted
207 ;; according to RFC 822.
208 (if (re-search-forward "[^- !#-'*+/-9=?A-Z^-~]"
211 ;; Quote fullname, escaping specials.
212 (goto-char fullname-start)
214 (while (re-search-forward "[\"\\]"
216 (replace-match "\\\\\\&" t))
218 (insert " <" login ">\n"))
219 ((eq mail-from-style 'parens)
220 (insert "From: " login " (")
221 (let ((fullname-start (point)))
223 (let ((fullname-end (point-marker)))
224 (goto-char fullname-start)
225 ;; RFC 822 says \ and nonmatching parentheses
226 ;; must be escaped in comments.
227 ;; Escape every instance of ()\ ...
228 (while (re-search-forward "[()\\]" fullname-end 1)
229 (replace-match "\\\\\\&" t))
230 ;; ... then undo escaping of matching parentheses,
231 ;; including matching nested parentheses.
232 (goto-char fullname-start)
233 (while (re-search-forward
234 "\\(\\=\\|[^\\]\\(\\\\\\\\\\)*\\)\\\\(\\(\\([^\\]\\|\\\\\\\\\\)*\\)\\\\)"
236 (replace-match "\\1(\\3)" t)
237 (goto-char fullname-start))))
239 ((null mail-from-style)
240 (insert "From: " login "\n")))))
241 ;; Insert an extra newline if we need it to work around
242 ;; Sun's bug that swallows newlines.
243 (goto-char (1+ delimline))
244 (if (eval mail-mailer-swallows-blank-line)
246 ;; Find and handle any FCC fields.
247 (goto-char (point-min))
248 (if (re-search-forward "^FCC:" delimline t)
249 (mail-do-fcc delimline))
257 (setq smtpmail-address-buffer (generate-new-buffer "*smtp-mail*"))
258 (setq smtpmail-recipient-address-list
259 (smtpmail-deduce-address-list tembuf (point-min) delimline))
260 (kill-buffer smtpmail-address-buffer)
262 (smtpmail-do-bcc delimline)
264 (if (not smtpmail-queue-mail)
265 (if (not (null smtpmail-recipient-address-list))
266 (if (not (smtpmail-via-smtp
267 smtpmail-recipient-address-list tembuf))
268 (error "Sending failed; SMTP protocol error"))
269 (error "Sending failed; no recipients"))
270 (let* ((file-data (concat
272 (concat (time-stamp-yyyy-mm-dd)
273 "_" (time-stamp-hh:mm:ss))))
274 (file-data (convert-standard-filename file-data))
275 (file-elisp (concat file-data ".el"))
276 (buffer-data (create-file-buffer file-data))
277 (buffer-elisp (create-file-buffer file-elisp))
278 (buffer-scratch "*queue-mail*"))
280 (set-buffer buffer-data)
282 (insert-buffer tembuf)
283 (write-file file-data)
284 (set-buffer buffer-elisp)
287 "(setq smtpmail-recipient-address-list '"
288 (prin1-to-string smtpmail-recipient-address-list)
290 (write-file file-elisp)
291 (set-buffer (generate-new-buffer buffer-scratch))
292 (insert (concat file-data "\n"))
293 (append-to-file (point-min)
295 smtpmail-queue-index)
297 (kill-buffer buffer-scratch)
298 (kill-buffer buffer-data)
299 (kill-buffer buffer-elisp))))
302 (kill-buffer errbuf)))))
304 (defun smtpmail-send-queued-mail ()
305 "Send mail that was queued as a result of setting `smtpmail-queue-mail'."
307 ;;; Get index, get first mail, send it, get second mail, etc...
308 (let ((buffer-index (find-file-noselect smtpmail-queue-index))
312 (set-buffer buffer-index)
313 (beginning-of-buffer)
315 (setq file-msg (buffer-substring (point) (save-excursion
319 (setq tembuf (find-file-noselect file-msg))
320 (if (not (null smtpmail-recipient-address-list))
321 (if (not (smtpmail-via-smtp smtpmail-recipient-address-list
323 (error "Sending failed; SMTP protocol error"))
324 (error "Sending failed; no recipients"))
325 (delete-file file-msg)
326 (delete-file (concat file-msg ".el"))
329 (set-buffer buffer-index)
330 (save-buffer smtpmail-queue-index)
331 (kill-buffer buffer-index)
334 ;(defun smtpmail-via-smtp (host,port,sender,destination,smtpmail-text-buffer)
336 (defun smtpmail-fqdn ()
337 (if smtpmail-local-domain
338 (concat (system-name) "." smtpmail-local-domain)
341 (defun smtpmail-via-smtp (recipient smtpmail-text-buffer)
343 (host (or smtpmail-smtp-server
344 (error "`smtpmail-smtp-server' not defined")))
345 (port smtpmail-smtp-service)
349 (supported-extensions '()))
352 ;; get or create the trace buffer
354 (get-buffer-create (format "*trace of SMTP session to %s*" host)))
356 ;; clear the trace buffer of old output
358 (set-buffer process-buffer)
361 ;; open the connection to the server
362 (setq process (open-network-stream "SMTP" process-buffer host port))
363 (and (null process) (throw 'done nil))
365 ;; set the send-filter
366 (set-process-filter process 'smtpmail-process-filter)
369 (set-buffer process-buffer)
370 (set-buffer-process-coding-system 'raw-text-unix 'raw-text-unix)
371 (make-local-variable 'smtpmail-read-point)
372 (setq smtpmail-read-point (point-min))
375 (if (or (null (car (setq greeting (smtpmail-read-response process))))
376 (not (integerp (car greeting)))
377 (>= (car greeting) 400))
382 (smtpmail-send-command process (format "EHLO %s" (smtpmail-fqdn)))
384 (if (or (null (car (setq response-code (smtpmail-read-response process))))
385 (not (integerp (car response-code)))
386 (>= (car response-code) 400))
389 (smtpmail-send-command process (format "HELO %s" (smtpmail-fqdn)))
391 (if (or (null (car (setq response-code (smtpmail-read-response process))))
392 (not (integerp (car response-code)))
393 (>= (car response-code) 400))
395 (let ((extension-lines (cdr (cdr response-code))))
396 (while extension-lines
397 (let ((name (intern (downcase (car (split-string (substring (car extension-lines) 4) "[ ]"))))))
399 (cond ((memq name '(verb xvrb 8bitmime onex xone
402 (setq supported-extensions
403 (cons name supported-extensions)))
404 (smtpmail-warn-about-unknown-extensions
405 (message "Unknown extension %s" name)))))
406 (setq extension-lines (cdr extension-lines)))))
408 (if (or (member 'onex supported-extensions)
409 (member 'xone supported-extensions))
411 (smtpmail-send-command process (format "ONEX"))
412 (if (or (null (car (setq response-code (smtpmail-read-response process))))
413 (not (integerp (car response-code)))
414 (>= (car response-code) 400))
417 (if (and smtpmail-debug-info
418 (or (member 'verb supported-extensions)
419 (member 'xvrb supported-extensions)))
421 (smtpmail-send-command process (format "VERB"))
422 (if (or (null (car (setq response-code (smtpmail-read-response process))))
423 (not (integerp (car response-code)))
424 (>= (car response-code) 400))
427 (if (member 'xusr supported-extensions)
429 (smtpmail-send-command process (format "XUSR"))
430 (if (or (null (car (setq response-code (smtpmail-read-response process))))
431 (not (integerp (car response-code)))
432 (>= (car response-code) 400))
435 ;; MAIL FROM: <sender>
437 (if (member 'size supported-extensions)
440 (set-buffer smtpmail-text-buffer)
442 (+ (- (point-max) (point-min))
443 ;; Add one byte for each change-of-line
444 ;; because or CR-LF representation:
445 (count-lines (point-min) (point-max))
446 ;; For some reason, an empty line is
447 ;; added to the message. Maybe this
448 ;; is a bug, but it can't hurt to add
449 ;; those two bytes anyway:
453 (if (member '8bitmime supported-extensions)
455 ;; Code should be added here that transforms
456 ;; the contents of the message buffer into
457 ;; something the receiving SMTP can handle.
458 ;; For a receiver that supports 8BITMIME, this
459 ;; may mean converting BINARY to BASE64, or
460 ;; adding Content-Transfer-Encoding and the
461 ;; other MIME headers. The code should also
462 ;; return an indication of what encoding the
463 ;; message buffer is now, i.e. ASCII or
469 ; (smtpmail-send-command process (format "MAIL FROM:%s@%s" (user-login-name) (smtpmail-fqdn)))
470 (smtpmail-send-command process (format "MAIL FROM: <%s>%s%s"
475 (if (or (null (car (setq response-code (smtpmail-read-response process))))
476 (not (integerp (car response-code)))
477 (>= (car response-code) 400))
481 ;; RCPT TO: <recipient>
483 (while (not (null (nth n recipient)))
484 (smtpmail-send-command process (format "RCPT TO: <%s>" (maybe-append-domain (nth n recipient))))
487 (setq response-code (smtpmail-read-response process))
488 (if (or (null (car response-code))
489 (not (integerp (car response-code)))
490 (>= (car response-code) 400))
496 (smtpmail-send-command process "DATA")
498 (if (or (null (car (setq response-code (smtpmail-read-response process))))
499 (not (integerp (car response-code)))
500 (>= (car response-code) 400))
505 (smtpmail-send-data process smtpmail-text-buffer)
508 (smtpmail-send-command process ".")
510 (if (or (null (car (setq response-code (smtpmail-read-response process))))
511 (not (integerp (car response-code)))
512 (>= (car response-code) 400))
517 ; (smtpmail-send-command process "QUIT")
518 ; (and (null (car (smtpmail-read-response process)))
523 (set-buffer (process-buffer process))
524 (smtpmail-send-command process "QUIT")
525 (smtpmail-read-response process)
527 ; (if (or (null (car (setq response-code (smtpmail-read-response process))))
528 ; (not (integerp (car response-code)))
529 ; (>= (car response-code) 400))
532 (delete-process process))))))
535 (defun smtpmail-process-filter (process output)
537 (set-buffer (process-buffer process))
538 (goto-char (point-max))
541 (defun smtpmail-read-response (process)
542 (let ((case-fold-search nil)
543 (response-strings nil)
544 (response-continue t)
545 (return-value '(nil ()))
548 (while response-continue
549 (goto-char smtpmail-read-point)
550 (while (not (search-forward "\r\n" nil t))
551 (accept-process-output process)
552 (goto-char smtpmail-read-point))
554 (setq match-end (point))
555 (setq response-strings
556 (cons (buffer-substring smtpmail-read-point (- match-end 2))
559 (goto-char smtpmail-read-point)
560 (if (looking-at "[0-9]+ ")
561 (let ((begin (match-beginning 0))
563 (if smtpmail-debug-info
564 (message "%s" (car response-strings)))
566 (setq smtpmail-read-point match-end)
568 ;; ignore lines that start with "0"
569 (if (looking-at "0[0-9]+ ")
571 (setq response-continue nil)
574 (buffer-substring begin end))
575 (nreverse response-strings)))))
577 (if (looking-at "[0-9]+-")
578 (progn (if smtpmail-debug-info
579 (message "%s" (car response-strings)))
580 (setq smtpmail-read-point match-end)
581 (setq response-continue t))
583 (setq smtpmail-read-point match-end)
584 (setq response-continue nil)
586 (cons nil (nreverse response-strings)))
589 (setq smtpmail-read-point match-end)
593 (defun smtpmail-send-command (process command)
594 (goto-char (point-max))
595 (if (= (aref command 0) ?P)
596 (insert "PASS <omitted>\r\n")
597 (insert command "\r\n"))
598 (setq smtpmail-read-point (point))
599 (process-send-string process command)
600 (process-send-string process "\r\n"))
602 (defun smtpmail-send-data-1 (process data)
603 (goto-char (point-max))
605 (if (and (multibyte-string-p data)
606 smtpmail-code-conv-from)
607 (setq data (string-as-multibyte
608 (encode-coding-string data smtpmail-code-conv-from))))
610 (if smtpmail-debug-info
611 (insert data "\r\n"))
613 (setq smtpmail-read-point (point))
614 ;; Escape "." at start of a line
615 (if (eq (string-to-char data) ?.)
616 (process-send-string process "."))
617 (process-send-string process data)
618 (process-send-string process "\r\n")
621 (defun smtpmail-send-data (process buffer)
630 (goto-char (point-min)))
636 (setq this-line (point))
638 (setq this-line-end (point))
639 (setq sending-data nil)
640 (setq sending-data (buffer-substring this-line this-line-end))
641 (if (/= (forward-line 1) 0)
642 (setq data-continue nil)))
644 (smtpmail-send-data-1 process sending-data)
650 (defun smtpmail-deduce-address-list (smtpmail-text-buffer header-start header-end)
651 "Get address list suitable for smtp RCPT TO: <address>."
652 (require 'mail-utils) ;; pick up mail-strip-quoted-names
656 (set-buffer smtpmail-address-buffer) (erase-buffer)
658 ((case-fold-search t)
659 (simple-address-list "")
663 (insert-buffer-substring smtpmail-text-buffer header-start header-end)
664 (goto-char (point-min))
665 ;; RESENT-* fields should stop processing of regular fields.
667 (if (re-search-forward "^Resent-\\(to\\|cc\\|bcc\\):" header-end t)
668 (setq addr-regexp "^Resent-\\(to\\|cc\\|bcc\\):")
669 (setq addr-regexp "^\\(To:\\|Cc:\\|Bcc:\\)")))
671 (while (re-search-forward addr-regexp header-end t)
673 (setq this-line (match-beginning 0))
675 ;; get any continuation lines
676 (while (and (looking-at "^[ \t]+") (< (point) header-end))
678 (setq this-line-end (point-marker))
679 (setq simple-address-list
680 (concat simple-address-list " "
681 (mail-strip-quoted-names (buffer-substring this-line this-line-end))))
685 (insert-string simple-address-list)
687 (subst-char-in-region (point-min) (point-max) 10 ? t);; newline --> blank
688 (subst-char-in-region (point-min) (point-max) ?, ? t);; comma --> blank
689 (subst-char-in-region (point-min) (point-max) 9 ? t);; tab --> blank
691 (goto-char (point-min))
692 ;; tidyness in case hook is not robust when it looks at this
693 (while (re-search-forward "[ \t]+" header-end t) (replace-match " "))
695 (goto-char (point-min))
696 (let (recipient-address-list)
697 (while (re-search-forward " \\([^ ]+\\) " (point-max) t)
699 (setq recipient-address-list (cons (buffer-substring (match-beginning 1) (match-end 1))
700 recipient-address-list))
702 (setq smtpmail-recipient-address-list recipient-address-list))
710 (defun smtpmail-do-bcc (header-end)
711 "Delete [Resent-]BCC: and their continuation lines from the header area.
712 There may be multiple BCC: lines, and each may have arbitrarily
713 many continuation lines."
714 (let ((case-fold-search t))
716 (goto-char (point-min))
717 ;; iterate over all BCC: lines
718 (while (re-search-forward "^\\(RESENT-\\)?BCC:" header-end t)
719 (delete-region (match-beginning 0)
720 (progn (forward-line 1) (point)))
721 ;; get rid of any continuation lines
722 (while (and (looking-at "^[ \t].*\n") (< (point) header-end))
723 (replace-match ""))))))
728 ;;; smtpmail.el ends here