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#! /usr/bin/env python
# $URL: svn+bsb://svn.winnegan.de/svn/adm/trunk/mailman/postfix-to-mailman.py $
# $Id: postfix-to-mailman.py 38 2004-04-15 19:11:32Z bsb $
#
# Interface mailman to a postfix with a mailman transport. Does not require
# the creation of _any_ aliases to connect lists to your mail system.
#
# Dax Kelson, dkelson@gurulabs.com, Sept 2002.
# coverted from qmail to postfix interface
# Jan 2003: Fixes for Mailman 2.1
# Thanks to Simen E. Sandberg <senilix@gallerbyen.net>
# Feb 2003: Change the suggested postfix transport to support VERP
# Thanks to Henrique de Moraes Holschuh <henrique.holschuh@ima.sp.gov.br>
#
# Mar 2004: Siggy Brentrup <bsb@debian.org>
# downloaded from http://www.gurulabs.com/files/postfix-to-mailman-2.1.py
# and adopted for inclusion in the Debian Mailman package.
# (hi Bruce, back to the roots :-)
# rewritten for python >= 2.2 taking configuration from mm_cfg
#
# This script was originally qmail-to-mailman.py by:
# Bruce Perens, bruce@perens.com, March 1999.
# This is free software under the GNU General Public License.
# This script is meant to be called as a postfix transport pipe.
# It catches all mail to a virtual domain, eg "lists.example.com". It
# looks at the recipient for each mail message and decides if the mail
# is addressed to a valid list or not, and optionally bounces the
# message with a helpful suggestion if it's not addressed to a
# list. It decides if it is a posting, a list command, or mail to the
# list administrator, by checking for the -admin, -owner, -request,
# -join, -leave, -subscribe and -unsubscribe addresses. It will
# recognize a list as soon as the list is created, there is no need to
# add _any_ aliases for any list. It recognizes mail to postmaster,
# abuse and mailer-daemon, and routes those mails to DEB_LISTMASTER as
# defined in mm_cfg.py
# INSTALLATION:
#
# Install this file as /var/lib/mailman/bin/postfix-to-mailman.py
#
# To configure a virtual domain to connect to mailman, edit Postfix thusly:
#
# /etc/postfix/main.cf:
# relay_domains = ... lists.example.com
# relay_recipient_maps = ... hash:/var/lib/mailman/data/virtual-mailman
# transport_maps = hash:/etc/postfix/transport
# mailman_destination_recipient_limit = 1
#
# /etc/postfix/master.cf
# mailman unix - n n - - pipe
# flags=FR user=list
# argv=/var/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
#
# /etc/postfix/transport:
# lists.example.com mailman:
#
# /etc/mailman/mm_cfg.py
# MTA = Postfix # So that mailman generates the recipients table
# POSTFIX_STYLE_VIRTUAL_DOMAINS = ['lists.example.com']
# # alias for postmaster, abuse and mailer-daemon
# DEB_LISTMASTER = 'postmaster@example.com'
#
# Replace lists.example.com above with the name of the domain to be
# connected to Mailman. Note that _all_ mail to that domain will go to
# Mailman, so you don't want to put the name of your main domain
# here. Typically a virtual domain lists.domain.com is used for
# Mailman, and domain.com for regular email.
#
# The recipient map allows Postfix to know which addresses exists.
# Thus, if someone tries to send a (spam?) message to an undefined
# address in the domain connected to Mailman, Postfix will just refuse
# it instead of sending a (backscatter?) bounce.
#
# When you are done, restart Postfix, and run /usr/lib/mailman/bin/genaliases
# to generate the initial recipient map for the existing mailing-lists.
# Exit codes accepted by postfix
# from postfix-2.0.16/src/global/sys_exits.h
EX_USAGE = 64 # command line usage error
EX_NOUSER = 67 # addressee unknown
EX_SOFTWARE = 70 # internal software error
EX_TEMPFAIL = 75 # temporary failure
import sys, os
sys.path.append("/usr/lib/mailman/bin")
import paths
from Mailman import mm_cfg
def main():
os.nice(5) # Handle mailing lists at non-interactive priority.
# delete this if you wish
try:
MailmanOwner = mm_cfg.DEB_LISTMASTER
except AttributeError:
MailmanOwner = 'postmaster@localhost'
try:
domain, local = [ a.lower() for a in sys.argv[1:] ]
except:
# This might happen if we're not using Postfix or
# /etc/postfix/master.cf is badly misconfigured
sys.stderr.write('Illegal invocation: %r\n'
% ' '.join(sys.argv))
if len(sys.argv) > 3:
sys.stderr.write('Did you forget to set '
'mailman_destination_recipient_limit=1 '
'in main.cf?')
sys.exit(EX_USAGE)
# Redirect required addresses to
if local in ('postmaster', 'abuse', 'mailer-daemon'):
os.execv("/usr/sbin/sendmail",
("/usr/sbin/sendmail", MailmanOwner))
sys.exit(0)
# Assume normal posting to a mailing list
mlist, func = local, 'post'
# Let Mailman decide if a list exists.
from Mailman.Utils import list_exists
if list_exists(mlist):
mm_pgm = os.path.join(paths.prefix, 'mail', 'mailman')
os.execv(mm_pgm, (mm_pgm, func, mlist))
# NOT REACHED
# Check for control extension on local part
for ext in ('-admin',
'-owner',
'-request',
'-bounces',
'-confirm',
'-join',
'-leave',
'-subscribe',
'-unsubscribe',
):
if local.endswith(ext):
mlist = local[:-len(ext)]
func = ext[1:]
break
if list_exists(mlist):
mm_pgm = os.path.join(paths.prefix, 'mail', 'mailman')
os.execv(mm_pgm, (mm_pgm, func, mlist))
# NOT REACHED
else:
try:
sys.stderr.write(mm_cfg.DEB_HELP_TEXT)
except AttributeError:
sys.exit(EX_NOUSER)
sys.exit(1)
if __name__ == '__main__':
try:
main()
except SystemExit, argument:
sys.exit(argument)
except Exception:
xt, xv, tb = sys.exc_info()
sys.stderr.write("%s %s\n" % (xt, xv))
sys.stderr.write("Line %d\n" % (tb.tb_lineno))
sys.exit(EX_TEMPFAIL) # Soft failure, try again later.
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