1 files changed, 86 insertions, 0 deletions
diff --git a/src/mailman/Bouncers/Postfix.py b/src/mailman/Bouncers/Postfix.py
new file mode 100644
index 000000000..cfc97a05e
--- /dev/null
+++ b/src/mailman/Bouncers/Postfix.py
@@ -0,0 +1,86 @@
+# Copyright (C) 1998-2009 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman 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 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman 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 Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Parse bounce messages generated by Postfix.
+
+This also matches something called `Keftamail' which looks just like Postfix
+bounces with the word Postfix scratched out and the word `Keftamail' written
+in in crayon.
+
+It also matches something claiming to be `The BNS Postfix program', and
+`SMTP_Gateway'.  Everybody's gotta be different, huh?
+"""
+
+import re
+from cStringIO import StringIO
+
+
+
+def flatten(msg, leaves):
+    # give us all the leaf (non-multipart) subparts
+    if msg.is_multipart():
+        for part in msg.get_payload():
+            flatten(part, leaves)
+    else:
+        leaves.append(msg)
+
+
+
+# are these heuristics correct or guaranteed?
+pcre = re.compile(r'[ \t]*the\s*(bns)?\s*(postfix|keftamail|smtp_gateway)',
+                  re.IGNORECASE)
+rcre = re.compile(r'failure reason:$', re.IGNORECASE)
+acre = re.compile(r'<(?P<addr>[^>]*)>:')
+
+def findaddr(msg):
+    addrs = []
+    body = StringIO(msg.get_payload())
+    # simple state machine
+    #     0 == nothing found
+    #     1 == salutation found
+    state = 0
+    while 1:
+        line = body.readline()
+        if not line:
+            break
+        # preserve leading whitespace
+        line = line.rstrip()
+        # yes use match to match at beginning of string
+        if state == 0 and (pcre.match(line) or rcre.match(line)):
+            state = 1
+        elif state == 1 and line:
+            mo = acre.search(line)
+            if mo:
+                addrs.append(mo.group('addr'))
+            # probably a continuation line
+    return addrs
+
+
+
+def process(msg):
+    if msg.get_content_type() not in ('multipart/mixed', 'multipart/report'):
+        return None
+    # We're looking for the plain/text subpart with a Content-Description: of
+    # `notification'.
+    leaves = []
+    flatten(msg, leaves)
+    for subpart in leaves:
+        if subpart.get_content_type() == 'text/plain' and \
+           subpart.get('content-description', '').lower() == 'notification':
+            # then...
+            return findaddr(subpart)
+    return None