-;;; smtp.el --- basic functions to send mail with SMTP server
-
-;; Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
-
-;; Author: Tomoji Kagatani <kagatani@rbc.ncl.omron.co.jp>
-;; 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:
-
-(require 'mail-utils) ; pick up mail-strip-quoted-names
-
-(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 "smtp"
- "*SMTP service port number. \"smtp\" or 25."
- :type '(choice (integer :tag "25" 25)
- (string :tag "smtp" "smtp"))
- :group 'smtp)
-
-(defcustom smtp-use-8bitmime t
- "*If non-nil, use ESMTP 8BITMIME if available."
- :type 'boolean
- :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-coding-system 'binary
- "*Coding-system for SMTP output."
- :type 'coding-system
- :group 'smtp)
-
-(defvar smtp-debug-info nil)
-(defvar smtp-read-point nil)
-
-(defun smtp-make-fqdn ()
- "Return user's fully qualified domain name."
- (let ((system-name (system-name)))
- (cond
- (smtp-local-domain
- (concat system-name "." smtp-local-domain))
- ((string-match "[^.]\\.[^.]" system-name)
- system-name)
- (t
- (error "Cannot generate valid FQDN. Set `smtp-local-domain' correctly.")))))
-
-(defun smtp-via-smtp (sender recipients smtp-text-buffer)
- (let ((coding-system-for-read smtp-coding-system)
- (coding-system-for-write smtp-coding-system)
- process response extensions)
- (save-excursion
- (set-buffer
- (get-buffer-create
- (format "*trace of SMTP session to %s*" smtp-server)))
- (erase-buffer)
- (make-local-variable 'smtp-read-point)
- (setq smtp-read-point (point-min))
-
- (unwind-protect
- (catch 'done
- (setq process (open-network-stream "SMTP"
- (current-buffer)
- smtp-server smtp-service))
- (or process (throw 'done nil))
-
- (set-process-filter process 'smtp-process-filter)
-
- ;; Greeting
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))
-
- ;; EHLO
- (smtp-send-command process
- (format "EHLO %s" (smtp-make-fqdn)))
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (progn
- ;; HELO
- (smtp-send-command process
- (format "HELO %s" (smtp-make-fqdn)))
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response)))))
- (let ((extension-lines (cdr (cdr response))))
- (while extension-lines
- (push (intern (downcase (substring (car extension-lines) 4)))
- extensions)
- (setq extension-lines (cdr extension-lines)))))
-
- ;; ONEX --- One message transaction only (sendmail extension?)
- (if (or (memq 'onex extensions)
- (memq 'xone extensions))
- (progn
- (smtp-send-command process "ONEX")
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))))
-
- ;; VERB --- Verbose (sendmail extension?)
- (if (and smtp-debug-info
- (or (memq 'verb extensions)
- (memq 'xvrb extensions)))
- (progn
- (smtp-send-command process "VERB")
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))))
-
- ;; XUSR --- Initial (user) submission (sendmail extension?)
- (if (memq 'xusr extensions)
- (progn
- (smtp-send-command process "XUSR")
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))))
-
- ;; MAIL FROM:<sender>
- (smtp-send-command
- process
- (format "MAIL FROM:<%s>%s%s"
- sender
- ;; SIZE --- Message Size Declaration (RFC1870)
- (if (memq 'size extensions)
- (format " SIZE=%d"
- (save-excursion
- (set-buffer smtp-text-buffer)
- (+ (- (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)))
- "")
- ;; 8BITMIME --- 8bit-MIMEtransport (RFC1652)
- (if (and (memq '8bitmime extensions)
- smtp-use-8bitmime)
- " BODY=8BITMIME"
- "")))
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))
-
- ;; RCPT TO:<recipient>
- (while recipients
- (smtp-send-command process
- (format "RCPT TO:<%s>" (car recipients)))
- (setq recipients (cdr recipients))
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response)))))
-
- ;; DATA
- (smtp-send-command process "DATA")
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))
-
- ;; Mail contents
- (smtp-send-data process smtp-text-buffer)
-
- ;; DATA end "."
- (smtp-send-command process ".")
- (setq response (smtp-read-response process))
- (if (or (null (car response))
- (not (integerp (car response)))
- (>= (car response) 400))
- (throw 'done (car (cdr response))))
-
- t)
-
- (if (and process
- (eq (process-status process) 'open))
- (progn
- ;; QUIT
- (smtp-send-command process "QUIT")
- (smtp-read-response process)
- (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))
- (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 (or (/= (forward-line 1) 0) (eobp))
- (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>."
- (let ((case-fold-search t)
- (simple-address-list "")
- this-line
- this-line-end
- addr-regexp
- (smtp-address-buffer (generate-new-buffer " *smtp-mail*")))
- (unwind-protect
- (save-excursion
- ;;
- (set-buffer smtp-address-buffer)
- (erase-buffer)
- (insert (save-excursion
- (set-buffer smtp-text-buffer)
- (buffer-substring-no-properties 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")
- ;; newline --> blank
- (subst-char-in-region (point-min) (point-max) 10 ? t)
- ;; comma --> blank
- (subst-char-in-region (point-min) (point-max) ?, ? t)
- ;; tab --> blank
- (subst-char-in-region (point-min) (point-max) 9 ? t)
-
- (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)))
- recipient-address-list))
- (kill-buffer smtp-address-buffer))))
-
-(provide 'smtp)
-
-;;; smtp.el ends here
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