Upgraded to MH-E version 7.3.

See etc/MH-E-NEWS and lisp/mh-e/ChangeLog for details.

1 files changed, 416 insertions, 0 deletions

diff --git a/lisp/mh-e/mh-junk.el b/lisp/mh-e/mh-junk.el
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+;;; mh-junk.el --- Interface to anti-spam measures
+
+;; Copyright (C) 2003 Free Software Foundation, Inc.
+
+;; Author: Satyaki Das <satyaki@theforce.stanford.edu>,
+;;         Bill Wohler <wohler@newt.com>
+;; Maintainer: Bill Wohler <wohler@newt.com>
+;; Keywords:  mail, spam
+
+;; 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.
+
+;;; Commentary:
+
+;; Spam handling in MH-E.
+
+;;; Change Log:
+
+;;; Code:
+
+(require 'mh-e)
+
+;; Interactive functions callable from the folder buffer
+;;;###mh-autoload
+(defun mh-junk-blacklist (msg-or-seq)
+  "Blacklist MSG-OR-SEQ as spam.
+Default is the displayed message.
+If optional prefix argument is provided, then prompt for the message sequence.
+If variable `transient-mark-mode' is non-nil and the mark is active, then the
+selected region is blacklisted.
+In a program, MSG-OR-SEQ can be a message number, a list of message numbers, a
+region in a cons cell, or a sequence.
+
+First the appropriate function is called depending on the value of
+`mh-junk-choice'. Then if `mh-junk-mail-folder' is a string then the message is
+refiled to that folder. If nil, the message is deleted.
+
+To change the spam program being used, customize `mh-junk-program'. Directly
+setting `mh-junk-choice' is not recommended.
+
+The documentation for the following functions describes what setup is needed
+for the different spam fighting programs:
+
+  - `mh-bogofilter-blacklist'
+  - `mh-spamprobe-blacklist'
+  - `mh-spamassassin-blacklist'"
+  (interactive (list (mh-interactive-msg-or-seq "Blacklist")))
+  (let ((blacklist-func (nth 1 (assoc mh-junk-choice mh-junk-function-alist))))
+    (unless blacklist-func
+      (error "Customize `mh-junk-program' appropriately"))
+    (let ((dest (cond ((null mh-junk-mail-folder) nil)
+                      ((equal mh-junk-mail-folder "") "+")
+                      ((eq (aref mh-junk-mail-folder 0) ?+)
+                       mh-junk-mail-folder)
+                      ((eq (aref mh-junk-mail-folder 0) ?@)
+                       (concat mh-current-folder "/"
+                               (substring mh-junk-mail-folder 1)))
+                      (t (concat "+" mh-junk-mail-folder)))))
+      (mh-iterate-on-msg-or-seq msg msg-or-seq
+        (funcall (symbol-function blacklist-func) msg)
+        (if dest
+            (mh-refile-a-msg nil (intern dest))
+          (mh-delete-a-msg nil)))
+      (mh-next-msg))))
+
+;;;###mh-autoload
+(defun mh-junk-whitelist (msg-or-seq)
+  "Whitelist MSG-OR-SEQ incorrectly classified as spam.
+Default is the displayed message.
+If optional prefix argument is provided, then prompt for the message sequence.
+If variable `transient-mark-mode' is non-nil and the mark is active, then the
+selected region is whitelisted.
+In a program, MSG-OR-SEQ can be a message number, a list of message numbers, a
+region in a cons cell, or a sequence.
+
+First the appropriate function is called depending on the value of
+`mh-junk-choice'. Then the message is refiled to `mh-inbox'.
+
+To change the spam program being used, customize `mh-junk-program'. Directly
+setting `mh-junk-choice' is not recommended."
+  (interactive (list (mh-interactive-msg-or-seq "Whitelist")))
+  (let ((whitelist-func (nth 2 (assoc mh-junk-choice mh-junk-function-alist))))
+    (unless whitelist-func
+      (error "Customize `mh-junk-program' appropriately"))
+    (mh-iterate-on-msg-or-seq msg msg-or-seq
+      (funcall (symbol-function whitelist-func) msg)
+      (mh-refile-a-msg nil (intern mh-inbox)))
+    (mh-next-msg)))
+
+
+
+;; Bogofilter Interface
+
+(defvar mh-bogofilter-executable (executable-find "bogofilter"))
+
+(defun mh-bogofilter-blacklist (msg)
+  "Classify MSG as spam.
+Tell bogofilter that the message is spam.
+
+Bogofilter is a Bayesian spam filtering program. Get it from your local
+distribution or from:
+   http://bogofilter.sourceforge.net/
+
+You first need to teach bogofilter. This is done by running
+
+   bogofilter -n < good-message
+
+on every good message, and
+
+   bogofilter -s < spam-message
+
+on every spam message. Most Bayesian filters need 1000 to 5000 of each to
+start doing a good job.
+
+To use bogofilter, add the following .procmailrc recipes which you can also
+find in the bogofilter man page:
+
+   # Bogofilter
+   :0fw
+   | bogofilter -u -e -p
+
+   :0
+   * ^X-Bogosity: Yes, tests=bogofilter
+   $SPAM
+
+Bogofilter continues to feed the messages it classifies back into its
+database. Occasionally it misses, and those messages need to be reclassified.
+MH-E can do this for you. Use \\[mh-junk-blacklist] to reclassify messges in
+your +inbox as spam, and \\[mh-junk-whitelist] to reclassify messages in your
+spambox as good messages."
+  (unless mh-bogofilter-executable
+    (error "Couldn't find the bogofilter executable"))
+  (let ((msg-file (mh-msg-filename msg mh-current-folder)))
+    (call-process mh-bogofilter-executable msg-file 0 nil "-Ns")))
+
+(defun mh-bogofilter-whitelist (msg)
+  "Reinstate incorrectly filtered MSG.
+Train bogofilter to think of the message as non-spam."
+  (unless mh-bogofilter-executable
+    (error "Couldn't find the bogofilter executable"))
+  (let ((msg-file (mh-msg-filename msg mh-current-folder)))
+    (call-process mh-bogofilter-executable msg-file 0 nil "-Sn")))
+
+
+
+;; Spamprobe Interface
+
+(defvar mh-spamprobe-executable (executable-find "spamprobe"))
+
+(defun mh-spamprobe-blacklist (msg)
+  "Classify MSG as spam.
+Tell spamprobe that the message is spam.
+
+Spamprobe is a Bayesian spam filtering program. More info about the program can
+be found at:
+   http://spamprobe.sourceforge.net
+
+Here is a procmail recipe to stores incoming spam mail into the folder +spam
+and good mail in /home/user/Mail/mdrop/mbox. This recipe is provided as an
+example in the spamprobe man page.
+
+   PATH=/bin:/usr/bin:/usr/local/bin
+   DEFAULT=/home/user/Mail/mdrop/mbox
+   SPAM=/home/user/Mail/spam/.
+
+   # Spamprobe filtering
+   :0
+   SCORE=| spamprobe receive
+   :0 wf
+   | formail -I \"X-SpamProbe: $SCORE\"
+   :0 a:
+   *^X-SpamProbe: SPAM
+   $SPAM
+
+Occasionally some good mail gets misclassified as spam. You can use
+\\[mh-junk-whitelist] to reclassify that as good mail."
+  (unless mh-spamprobe-executable
+    (error "Couldn't find the spamprobe executable"))
+  (let ((msg-file (mh-msg-filename msg mh-current-folder)))
+    (call-process mh-spamprobe-executable msg-file 0 nil "spam")))
+
+(defun mh-spamprobe-whitelist (msg)
+  "Reinstate incorrectly filtered MSG.
+Train spamprobe to think of the message as non-spam."
+  (unless mh-spamprobe-executable
+    (error "Couldn't find the spamprobe executable"))
+  (let ((msg-file (mh-msg-filename msg mh-current-folder)))
+    (call-process mh-spamprobe-executable msg-file 0 nil "good")))
+
+
+
+;; Spamassassin Interface
+
+(defvar mh-spamassassin-executable (executable-find "spamassassin"))
+(defvar mh-sa-learn-executable (executable-find "sa-learn"))
+
+(defun mh-spamassassin-blacklist (msg)
+  "Blacklist MSG.
+This is done by sending the message to Razor and by appending the sender to
+~/.spamassassin/user_prefs in a blacklist_from rule. If sa-learn is available,
+the message is also recategorized as spam.
+
+Spamassassin is an excellent spam filter. For more information, see:
+  http://spamassassin.org/.
+
+I ran \"spamassassin -t\" on every mail message in my archive and ran an
+analysis in Gnumeric to find that the standard deviation of good mail
+scored under 5 (coincidentally, the spamassassin default for \"spam\").
+
+Furthermore, I observed that there weren't any messages with a score of 8
+or more that were interesting, so I added a couple of points to be
+conservative and send any message with a score of 10 or more down the
+drain. You might want to use a score of 12 or 13 to be really conservative.
+I have found that this really decreases the amount of junk to review.
+
+Messages with a score of 5-9 are set aside for later review. The major
+weakness of rules-based filters is a plethora of false positives\; I catch one
+or two legitimate messages in here a week, so it is worthwhile to check.
+
+You might choose to do this analysis yourself to pick a good score for
+deleting spam sight unseen, or you might pick a score out of a hat, or you
+might choose to be very conservative and not delete any messages at all.
+
+Based upon this discussion, here is what the associated ~/.procmailrc
+entries look like. These rules appear before my list filters so that spam
+sent to mailing lists gets pruned too.
+
+   #
+   # Spam
+   #
+   :0fw
+   | spamc
+
+   # Anything with a spam level of 10 or more is junked immediately.
+   :0:
+   * ^X-Spam-Level: ..........
+   /dev/null
+
+   :0
+   * ^X-Spam-Status: Yes
+   $SPAM
+
+If you don't use \"spamc\", use \"spamassassin -P -a\".
+
+A handful of spam does find its way into +inbox. In this case, use
+\\[mh-junk-blacklist] to add a \"blacklist_from\" line to
+~/spamassassin/user_prefs, delete the message, and send the message to the
+Razor, so that others might not see this spam.
+
+Over time, you see some patterns in the blacklisted addresses and can
+replace several lines with wildcards. For example, it is clear that High
+Speed Media is the biggest bunch of jerks on the Net. Here are some of the
+entries I have for them, and the list continues to grow.
+
+   blacklist_from	*@*-hsm-*.com
+   blacklist_from	*@*182*643*.com
+   blacklist_from	*@*antarhsm*.com
+   blacklist_from	*@*h*speed*
+   blacklist_from	*@*hsm*182*.com
+   blacklist_from	*@*hsm*643*.com
+   blacklist_from	*@*hsmridi2983cslt227.com
+   blacklist_from	*@*list*hsm*.com
+   blacklist_from	*@h*s*media*
+   blacklist_from	*@hsmdrct.com
+   blacklist_from	*@hsmridi2983csltsite.com
+
+The function `mh-spamassassin-identify-spammers' is provided that shows the
+frequency counts of the host and domain names in your blacklist_from
+entries. This can be helpful when editing the blacklist_from entries.
+
+In versions of spamassassin (2.50 and on) that support a Bayesian classifier,
+\\[mh-junk-blacklist] uses the sa-learn program to recategorize the message as
+spam. Neither MH-E, nor spamassassin, rebuilds the database after adding
+words, so you will need to run \"sa-learn --rebuild\" periodically. This can
+be done by adding the following to your crontab:
+
+  0 * * * *	sa-learn --rebuild > /dev/null 2>&1"
+  (unless mh-spamassassin-executable
+    (error "Couldn't find the spamassassin executable"))
+  (let ((current-folder mh-current-folder)
+        (msg-file (mh-msg-filename msg mh-current-folder))
+        (sender))
+    (save-excursion
+      (message "Giving this message the Razor...")
+      (mh-truncate-log-buffer)
+      (call-process mh-spamassassin-executable msg-file mh-log-buffer nil
+                    "--report" "--remove-from-whitelist")
+      (when mh-sa-learn-executable
+          (message "Recategorizing this message as spam...")
+          (call-process mh-sa-learn-executable msg-file mh-log-buffer nil
+                        "--single" "--spam" "--local --no-rebuild"))
+      (message "Blacklisting address...")
+      (set-buffer (get-buffer-create mh-temp-buffer))
+      (erase-buffer)
+      (call-process (expand-file-name mh-scan-prog mh-progs) nil t nil
+                    (format "%s" msg) current-folder
+                    "-format" "%<(mymbox{from})%|%(addr{from})%>")
+      (goto-char (point-min))
+      (if (search-forward-regexp "^\\(.+\\)$" nil t)
+          (progn
+            (setq sender (match-string 0))
+            (mh-spamassassin-add-rule "blacklist_from" sender)
+            (message "Blacklisting address...done"))
+        (message "Blacklisting address...not done (from my address)")))))
+
+(defun mh-spamassassin-whitelist (msg)
+  "Whitelist MSG.
+Add a whitelist_from rule to the ~/.spamassassin/user_prefs file. If sa-learn
+is available, then the message is recategorized as ham."
+  (unless mh-spamassassin-executable
+    (error "Couldn't find the spamassassin executable"))
+  (let ((msg-file (mh-msg-filename msg mh-current-folder))
+        (show-buffer (get-buffer mh-show-buffer))
+        from)
+    (save-excursion
+      (set-buffer (get-buffer-create mh-temp-buffer))
+      (erase-buffer)
+      (message "Removing spamassassin markup from message...")
+      (call-process mh-spamassassin-executable msg-file mh-temp-buffer nil
+                    "--remove-markup")
+      (if show-buffer
+          (kill-buffer show-buffer))
+      (write-file msg-file)
+      (when mh-sa-learn-executable
+        (message "Recategorizing this message as ham...")
+        (call-process mh-sa-learn-executable msg-file mh-temp-buffer nil
+                      "--single" "--ham" "--local --no-rebuild"))
+      (message "Whitelisting address...")
+      (setq from (car (ietf-drums-parse-address (mh-get-header-field "From:"))))
+      (kill-buffer nil)
+      (unless (equal from "")
+        (mh-spamassassin-add-rule "whitelist_from" from))
+      (message "Whitelisting address...done"))))
+
+(defun mh-spamassassin-add-rule (rule body)
+  "Add a new rule to ~/.spamassassin/user_prefs.
+The name of the rule is RULE and its body is BODY."
+  (save-window-excursion
+    (let* ((line (format "%s\t%s\n" rule body))
+           (case-fold-search t)
+           (file (expand-file-name "~/.spamassassin/user_prefs"))
+           (buffer-exists (find-buffer-visiting file)))
+      (find-file file)
+      (if (not (search-forward (format "\n%s" line) nil t))
+          (progn
+            (goto-char (point-max))
+            (insert (if (bolp) "" "\n") line)
+            (save-buffer)))
+      (if (not buffer-exists)
+          (kill-buffer nil)))))
+
+(defun mh-spamassassin-identify-spammers ()
+  "Identifies spammers who are repeat offenders.
+
+For each blacklist_from entry from the last blank line of
+~/.spamassassin/user_prefs to the end of the file, a list of host and domain
+names along with their frequency counts is displayed. This information can be
+used to replace multiple blacklist_from entries with a single wildcard entry
+such as:
+
+  blacklist_from *@*amazingoffersdirect2u.com"
+  (interactive)
+  (let* ((file (expand-file-name "~/.spamassassin/user_prefs"))
+         (domains (make-hash-table :test 'equal)))
+    (find-file file)
+    ;; Only consider entries between last blank line and end of file.
+    (goto-char (1- (point-max)))
+    (search-backward-regexp "^$")
+    ;; Perform frequency count.
+    (save-excursion
+      (while (search-forward-regexp "^blacklist_from\\s-*\\(.*\\)@\\(.*\\)$"
+                                    nil t)
+        (let ((host (match-string 2))
+              value)
+          ;; Remove top-level-domain from hostname.
+          (setq host (cdr (reverse (split-string host "\\."))))
+          ;; Add counts for each host and domain part.
+          (while host
+            (setq value (gethash (car host) domains))
+            (puthash (car host) (1+ (if (not value) 0 value)) domains)
+            (setq host (cdr host))))))
+
+    ;; Output
+    (delete-other-windows)
+    (pop-to-buffer (get-buffer-create "*MH-E Spammer Frequencies*"))
+    (erase-buffer)
+    (maphash '(lambda (key value) ""
+                (if (> value 2)
+                    (insert (format "%s %s\n" key value))))
+             domains)
+    (sort-numeric-fields 2 (point-min) (point-max))
+    (reverse-region (point-min) (point-max))
+    (goto-char (point-min))))
+
+(provide 'mh-junk)
+
+;;; Local Variables:
+;;; indent-tabs-mode: nil
+;;; sentence-end-double-space: nil
+;;; End:
+
+;;; mh-junk.el ends here