1 ;;; smtpmail.el --- simple SMTP protocol (RFC 821) for sending mail
3 ;; Copyright (C) 1995, 1996 Free Software Foundation, Inc.
5 ;; Author: Tomoji Kagatani <kagatani@rbc.ncl.omron.co.jp>
6 ;; Maintainer: Brian D. Carlstrom <bdc@ai.mit.edu>
7 ;; ESMTP support: Simon Leinen <simon@switch.ch>
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
29 ;; Send Mail to smtp host from smtpmail temp buffer.
31 ;; Please add these lines in your .emacs(_emacs).
33 ;;(setq send-mail-function 'smtpmail-send-it)
34 ;;(setq smtpmail-default-smtp-server "YOUR SMTP HOST")
35 ;;(setq smtpmail-smtp-service "smtp")
36 ;;(setq smtpmail-local-domain "YOUR DOMAIN NAME")
37 ;;(setq smtpmail-debug-info t)
38 ;;(load-library "smtpmail")
39 ;;(setq smtpmail-code-conv-from nil)
40 ;;(setq user-full-name "YOUR NAME HERE")
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-debug-info nil
81 "*smtpmail debug info printout. messages and process buffer."
85 (defcustom smtpmail-code-conv-from nil ;; *junet*
86 "*smtpmail code convert from this code to *internal*..for tiny-mime.."
90 (defcustom smtpmail-queue-mail nil
91 "*Specify if mail is queued (if t) or sent immediately (if nil).
92 If queued, it is stored in the directory `smtpmail-queue-dir'
93 and sent with `smtpmail-send-queued-mail'."
97 (defcustom smtpmail-queue-dir "~/Mail/queued-mail/"
98 "*Directory where `smtpmail.el' stores queued mail."
102 (defvar smtpmail-queue-index-file "index"
103 "File name of queued mail index,
104 This is relative to `smtpmail-queue-dir'.")
106 (defvar smtpmail-queue-index (concat smtpmail-queue-dir
107 smtpmail-queue-index-file))
113 (defun smtpmail-send-it ()
114 (require 'mail-utils)
115 (let ((errbuf (if mail-interactive
116 (generate-new-buffer " smtpmail errors")
118 (tembuf (generate-new-buffer " smtpmail temp"))
119 (case-fold-search nil)
122 (mailbuf (current-buffer)))
127 (insert-buffer-substring mailbuf)
128 (goto-char (point-max))
129 ;; require one newline at the end.
130 (or (= (preceding-char) ?\n)
132 ;; Change header-delimiter to be what sendmail expects.
133 (goto-char (point-min))
135 (concat "^" (regexp-quote mail-header-separator) "\n"))
138 (setq delimline (point-marker))
139 ;; (sendmail-synch-aliases)
141 (expand-mail-aliases (point-min) delimline))
142 (goto-char (point-min))
143 ;; ignore any blank lines in the header
144 (while (and (re-search-forward "\n\n\n*" delimline t)
145 (< (point) delimline))
146 (replace-match "\n"))
147 (let ((case-fold-search t))
148 (goto-char (point-min))
149 (goto-char (point-min))
150 (while (re-search-forward "^Resent-to:" delimline t)
151 (setq resend-to-addresses
153 (narrow-to-region (point)
157 (append (mail-parse-comma-list)
158 resend-to-addresses))))
159 ;;; Apparently this causes a duplicate Sender.
160 ;;; ;; If the From is different than current user, insert Sender.
161 ;;; (goto-char (point-min))
162 ;;; (and (re-search-forward "^From:" delimline t)
164 ;;; (require 'mail-utils)
165 ;;; (not (string-equal
166 ;;; (mail-strip-quoted-names
167 ;;; (save-restriction
168 ;;; (narrow-to-region (point-min) delimline)
169 ;;; (mail-fetch-field "From")))
170 ;;; (user-login-name))))
173 ;;; (insert "Sender: " (user-login-name) "\n")))
174 ;; Don't send out a blank subject line
175 (goto-char (point-min))
176 (if (re-search-forward "^Subject:[ \t]*\n" delimline t)
178 ;; Put the "From:" field in unless for some odd reason
179 ;; they put one in themselves.
180 (goto-char (point-min))
181 (if (not (re-search-forward "^From:" delimline t))
182 (let* ((login user-mail-address)
183 (fullname (user-full-name)))
184 (cond ((eq mail-from-style 'angles)
185 (insert "From: " fullname)
186 (let ((fullname-start (+ (point-min) 6))
187 (fullname-end (point-marker)))
188 (goto-char fullname-start)
189 ;; Look for a character that cannot appear unquoted
190 ;; according to RFC 822.
191 (if (re-search-forward "[^- !#-'*+/-9=?A-Z^-~]"
194 ;; Quote fullname, escaping specials.
195 (goto-char fullname-start)
197 (while (re-search-forward "[\"\\]"
199 (replace-match "\\\\\\&" t))
201 (insert " <" login ">\n"))
202 ((eq mail-from-style 'parens)
203 (insert "From: " login " (")
204 (let ((fullname-start (point)))
206 (let ((fullname-end (point-marker)))
207 (goto-char fullname-start)
208 ;; RFC 822 says \ and nonmatching parentheses
209 ;; must be escaped in comments.
210 ;; Escape every instance of ()\ ...
211 (while (re-search-forward "[()\\]" fullname-end 1)
212 (replace-match "\\\\\\&" t))
213 ;; ... then undo escaping of matching parentheses,
214 ;; including matching nested parentheses.
215 (goto-char fullname-start)
216 (while (re-search-forward
217 "\\(\\=\\|[^\\]\\(\\\\\\\\\\)*\\)\\\\(\\(\\([^\\]\\|\\\\\\\\\\)*\\)\\\\)"
219 (replace-match "\\1(\\3)" t)
220 (goto-char fullname-start))))
222 ((null mail-from-style)
223 (insert "From: " login "\n")))))
224 ;; Insert an extra newline if we need it to work around
225 ;; Sun's bug that swallows newlines.
226 (goto-char (1+ delimline))
227 (if (eval mail-mailer-swallows-blank-line)
229 ;; Find and handle any FCC fields.
230 (goto-char (point-min))
231 (if (re-search-forward "^FCC:" delimline t)
232 (mail-do-fcc delimline))
240 (setq smtpmail-address-buffer (generate-new-buffer "*smtp-mail*"))
241 (setq smtpmail-recipient-address-list
242 (or resend-to-addresses
243 (smtpmail-deduce-address-list tembuf (point-min) delimline)))
244 (kill-buffer smtpmail-address-buffer)
246 (smtpmail-do-bcc delimline)
248 (if (not smtpmail-queue-mail)
249 (if (not (null smtpmail-recipient-address-list))
250 (if (not (smtpmail-via-smtp
251 smtpmail-recipient-address-list tembuf))
252 (error "Sending failed; SMTP protocol error"))
253 (error "Sending failed; no recipients"))
254 (let* ((file-data (concat
257 "%02y%02m%02d-%02H%02M%02S")))
258 (file-elisp (concat file-data ".el"))
259 (buffer-data (create-file-buffer file-data))
260 (buffer-elisp (create-file-buffer file-elisp))
261 (buffer-scratch "*queue-mail*"))
263 (set-buffer buffer-data)
265 (insert-buffer tembuf)
266 (write-file file-data)
267 (set-buffer buffer-elisp)
270 "(setq smtpmail-recipient-address-list '"
271 (prin1-to-string smtpmail-recipient-address-list)
273 (write-file file-elisp)
274 (set-buffer (generate-new-buffer buffer-scratch))
275 (insert (concat file-data "\n"))
276 (append-to-file (point-min)
278 smtpmail-queue-index)
280 (kill-buffer buffer-scratch)
281 (kill-buffer buffer-data)
282 (kill-buffer buffer-elisp))))
285 (kill-buffer errbuf)))))
287 (defun smtpmail-send-queued-mail ()
288 "Send mail that was queued as a result of setting `smtpmail-queue-mail'."
290 ;;; Get index, get first mail, send it, get second mail, etc...
291 (let ((buffer-index (find-file-noselect smtpmail-queue-index))
295 (set-buffer buffer-index)
296 (beginning-of-buffer)
298 (setq file-msg (buffer-substring (point) (save-excursion
302 (setq tembuf (find-file-noselect file-msg))
303 (if (not (null smtpmail-recipient-address-list))
304 (if (not (smtpmail-via-smtp smtpmail-recipient-address-list
306 (error "Sending failed; SMTP protocol error"))
307 (error "Sending failed; no recipients"))
308 (delete-file file-msg)
309 (delete-file (concat file-msg ".el"))
312 (set-buffer buffer-index)
313 (save-buffer smtpmail-queue-index)
314 (kill-buffer buffer-index)
317 ;(defun smtpmail-via-smtp (host,port,sender,destination,smtpmail-text-buffer)
319 (defun smtpmail-fqdn ()
320 (if smtpmail-local-domain
321 (concat (system-name) "." smtpmail-local-domain)
324 (defun smtpmail-via-smtp (recipient smtpmail-text-buffer)
326 (host smtpmail-smtp-server)
327 (port smtpmail-smtp-service)
331 (supported-extensions '()))
334 ;; get or create the trace buffer
336 (get-buffer-create (format "*trace of SMTP session to %s*" host)))
338 ;; clear the trace buffer of old output
340 (set-buffer process-buffer)
343 ;; open the connection to the server
344 (setq process (open-network-stream "SMTP" process-buffer host port))
345 (and (null process) (throw 'done nil))
347 ;; set the send-filter
348 (set-process-filter process 'smtpmail-process-filter)
351 (set-buffer process-buffer)
352 (make-local-variable 'smtpmail-read-point)
353 (setq smtpmail-read-point (point-min))
356 (if (or (null (car (setq greeting (smtpmail-read-response process))))
357 (not (integerp (car greeting)))
358 (>= (car greeting) 400))
363 (smtpmail-send-command process (format "EHLO %s" (smtpmail-fqdn)))
365 (if (or (null (car (setq response-code (smtpmail-read-response process))))
366 (not (integerp (car response-code)))
367 (>= (car response-code) 400))
370 (smtpmail-send-command process (format "HELO %s" (smtpmail-fqdn)))
372 (if (or (null (car (setq response-code (smtpmail-read-response process))))
373 (not (integerp (car response-code)))
374 (>= (car response-code) 400))
376 (let ((extension-lines (cdr (cdr response-code))))
377 (while extension-lines
378 (let ((name (intern (downcase (substring (car extension-lines) 4)))))
380 (cond ((memq name '(verb xvrb 8bitmime onex xone
383 (setq supported-extensions
384 (cons name supported-extensions)))
385 (t (message "unknown extension %s"
387 (setq extension-lines (cdr extension-lines)))))
389 (if (or (member 'onex supported-extensions)
390 (member 'xone supported-extensions))
392 (smtpmail-send-command process (format "ONEX"))
393 (if (or (null (car (setq response-code (smtpmail-read-response process))))
394 (not (integerp (car response-code)))
395 (>= (car response-code) 400))
398 (if (and smtpmail-debug-info
399 (or (member 'verb supported-extensions)
400 (member 'xvrb supported-extensions)))
402 (smtpmail-send-command process (format "VERB"))
403 (if (or (null (car (setq response-code (smtpmail-read-response process))))
404 (not (integerp (car response-code)))
405 (>= (car response-code) 400))
408 (if (member 'xusr supported-extensions)
410 (smtpmail-send-command process (format "XUSR"))
411 (if (or (null (car (setq response-code (smtpmail-read-response process))))
412 (not (integerp (car response-code)))
413 (>= (car response-code) 400))
416 ;; MAIL FROM: <sender>
418 (if (member 'size supported-extensions)
421 (set-buffer smtpmail-text-buffer)
423 (+ (- (point-max) (point-min))
424 ;; Add one byte for each change-of-line
425 ;; because or CR-LF representation:
426 (count-lines (point-min) (point-max))
427 ;; For some reason, an empty line is
428 ;; added to the message. Maybe this
429 ;; is a bug, but it can't hurt to add
430 ;; those two bytes anyway:
434 (if (member '8bitmime supported-extensions)
436 ;; Code should be added here that transforms
437 ;; the contents of the message buffer into
438 ;; something the receiving SMTP can handle.
439 ;; For a receiver that supports 8BITMIME, this
440 ;; may mean converting BINARY to BASE64, or
441 ;; adding Content-Transfer-Encoding and the
442 ;; other MIME headers. The code should also
443 ;; return an indication of what encoding the
444 ;; message buffer is now, i.e. ASCII or
450 ; (smtpmail-send-command process (format "MAIL FROM:%s@%s" (user-login-name) (smtpmail-fqdn)))
451 (smtpmail-send-command process (format "MAIL FROM: <%s>%s%s"
456 (if (or (null (car (setq response-code (smtpmail-read-response process))))
457 (not (integerp (car response-code)))
458 (>= (car response-code) 400))
462 ;; RCPT TO: <recipient>
464 (while (not (null (nth n recipient)))
465 (smtpmail-send-command process (format "RCPT TO: <%s>" (nth n recipient)))
468 (setq response-code (smtpmail-read-response process))
469 (if (or (null (car response-code))
470 (not (integerp (car response-code)))
471 (>= (car response-code) 400))
477 (smtpmail-send-command process "DATA")
479 (if (or (null (car (setq response-code (smtpmail-read-response process))))
480 (not (integerp (car response-code)))
481 (>= (car response-code) 400))
486 (smtpmail-send-data process smtpmail-text-buffer)
489 (smtpmail-send-command process ".")
491 (if (or (null (car (setq response-code (smtpmail-read-response process))))
492 (not (integerp (car response-code)))
493 (>= (car response-code) 400))
498 ; (smtpmail-send-command process "QUIT")
499 ; (and (null (car (smtpmail-read-response process)))
504 (set-buffer (process-buffer process))
505 (smtpmail-send-command process "QUIT")
506 (smtpmail-read-response process)
508 ; (if (or (null (car (setq response-code (smtpmail-read-response process))))
509 ; (not (integerp (car response-code)))
510 ; (>= (car response-code) 400))
513 (delete-process process))))))
516 (defun smtpmail-process-filter (process output)
518 (set-buffer (process-buffer process))
519 (goto-char (point-max))
522 (defun smtpmail-read-response (process)
523 (let ((case-fold-search nil)
524 (response-strings nil)
525 (response-continue t)
526 (return-value '(nil ()))
529 (while response-continue
530 (goto-char smtpmail-read-point)
531 (while (not (search-forward "\r\n" nil t))
532 (accept-process-output process)
533 (goto-char smtpmail-read-point))
535 (setq match-end (point))
536 (setq response-strings
537 (cons (buffer-substring smtpmail-read-point (- match-end 2))
540 (goto-char smtpmail-read-point)
541 (if (looking-at "[0-9]+ ")
542 (let ((begin (match-beginning 0))
544 (if smtpmail-debug-info
545 (message "%s" (car response-strings)))
547 (setq smtpmail-read-point match-end)
549 ;; ignore lines that start with "0"
550 (if (looking-at "0[0-9]+ ")
552 (setq response-continue nil)
555 (buffer-substring begin end))
556 (nreverse response-strings)))))
558 (if (looking-at "[0-9]+-")
559 (progn (if smtpmail-debug-info
560 (message "%s" (car response-strings)))
561 (setq smtpmail-read-point match-end)
562 (setq response-continue t))
564 (setq smtpmail-read-point match-end)
565 (setq response-continue nil)
567 (cons nil (nreverse response-strings)))
570 (setq smtpmail-read-point match-end)
574 (defun smtpmail-send-command (process command)
575 (goto-char (point-max))
576 (if (= (aref command 0) ?P)
577 (insert "PASS <omitted>\r\n")
578 (insert command "\r\n"))
579 (setq smtpmail-read-point (point))
580 (process-send-string process command)
581 (process-send-string process "\r\n"))
583 (defun smtpmail-send-data-1 (process data)
584 (goto-char (point-max))
586 (if (not (null smtpmail-code-conv-from))
587 (setq data (code-convert-string data smtpmail-code-conv-from *internal*)))
589 (if smtpmail-debug-info
590 (insert data "\r\n"))
592 (setq smtpmail-read-point (point))
593 ;; Escape "." at start of a line
594 (if (eq (string-to-char data) ?.)
595 (process-send-string process "."))
596 (process-send-string process data)
597 (process-send-string process "\r\n")
600 (defun smtpmail-send-data (process buffer)
609 (goto-char (point-min)))
615 (setq this-line (point))
617 (setq this-line-end (point))
618 (setq sending-data nil)
619 (setq sending-data (buffer-substring this-line this-line-end))
620 (if (/= (forward-line 1) 0)
621 (setq data-continue nil)))
623 (smtpmail-send-data-1 process sending-data)
629 (defun smtpmail-deduce-address-list (smtpmail-text-buffer header-start header-end)
630 "Get address list suitable for smtp RCPT TO: <address>."
631 (require 'mail-utils) ;; pick up mail-strip-quoted-names
633 ((case-fold-search t)
634 (simple-address-list "")
642 (set-buffer smtpmail-address-buffer) (erase-buffer)
643 (insert-buffer-substring smtpmail-text-buffer header-start header-end)
644 (goto-char (point-min))
645 ;; RESENT-* fields should stop processing of regular fields.
647 (if (re-search-forward "^RESENT-TO:" header-end t)
648 (setq addr-regexp "^\\(RESENT-TO:\\|RESENT-CC:\\|RESENT-BCC:\\)")
649 (setq addr-regexp "^\\(TO:\\|CC:\\|BCC:\\)")))
651 (while (re-search-forward addr-regexp header-end t)
653 (setq this-line (match-beginning 0))
655 ;; get any continuation lines
656 (while (and (looking-at "^[ \t]+") (< (point) header-end))
658 (setq this-line-end (point-marker))
659 (setq simple-address-list
660 (concat simple-address-list " "
661 (mail-strip-quoted-names (buffer-substring this-line this-line-end))))
665 (insert-string simple-address-list)
667 (subst-char-in-region (point-min) (point-max) 10 ? t);; newline --> blank
668 (subst-char-in-region (point-min) (point-max) ?, ? t);; comma --> blank
669 (subst-char-in-region (point-min) (point-max) 9 ? t);; tab --> blank
671 (goto-char (point-min))
672 ;; tidyness in case hook is not robust when it looks at this
673 (while (re-search-forward "[ \t]+" header-end t) (replace-match " "))
675 (goto-char (point-min))
676 (let (recipient-address-list)
677 (while (re-search-forward " \\([^ ]+\\) " (point-max) t)
679 (setq recipient-address-list (cons (buffer-substring (match-beginning 1) (match-end 1))
680 recipient-address-list))
682 (setq smtpmail-recipient-address-list recipient-address-list))
690 (defun smtpmail-do-bcc (header-end)
691 "Delete BCC: and their continuation lines from the header area.
692 There may be multiple BCC: lines, and each may have arbitrarily
693 many continuation lines."
694 (let ((case-fold-search t))
695 (save-excursion (goto-char (point-min))
696 ;; iterate over all BCC: lines
697 (while (re-search-forward "^BCC:" header-end t)
698 (delete-region (match-beginning 0) (progn (forward-line 1) (point)))
699 ;; get rid of any continuation lines
700 (while (and (looking-at "^[ \t].*\n") (< (point) header-end))
711 ;;; smtpmail.el ends here