postfix-to-mailman.py
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	#!/usr/bin/env python3

	# -------------------------------------------------------------
	# Mailman transport for postfix
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Nasqueron
	# Source: postfix-to-mailman-2.1.py
	# Description: Interface mailman to a postfix with a mailman transport.
	# Does not require the creation of _any_ aliases to connect
	# lists to the mail system.
	# License: GPLv2
	# Authors: Original script for qmail by Bruce Perens, March 1999
	#
	# Dax Kelson, dkelson@gurulabs.com, Sept 2002.
	# Converted 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>
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# README
	#
	# 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 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, and -request 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, mailman-owner, abuse, mailer-daemon, root,
	# and owner, and routes those mails to MailmanOwner as defined in the
	# configuration variables, above.
	# -------------------------------------------------------------


	import os
	import sys
	import re
	import string


	# -------------------------------------------------------------
	# Configuration
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


	# Mailman home directory.
	MailmanHome = "/usr/local/mailman"

	# Postmaster and abuse mail recipient.
	MailmanOwner = "{{ mailmanAbuse }}"

	# Where mailman scripts reside
	MailmanScripts = "/usr/local/mailman"


	# -------------------------------------------------------------
	# Postfix / mailman transport methods
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


	def main():
	os.nice(5) # Handle mailing lists at non-interactive priority.
	# delete this if you wish

	os.chdir(MailmanHome + "/lists")

	try:
	local = sys.argv[2]
	except IndexError:
	# This might happen if we're not using Postfix
	sys.stderr.write("LOCAL not set?\n")
	sys.exit(1)

	local = string.lower(local)
	local = re.sub("^mailman-", "", local)

	names = ("root", "postmaster", "mailer-daemon", "mailman-owner", "owner", "abuse")
	for name in names:
	if name == local:
	os.execv("/usr/sbin/sendmail", ("/usr/sbin/sendmail", MailmanOwner))
	sys.exit(0)

	type = "post"
	types = (
	("-admin$", "admin"),
	("-owner$", "owner"),
	("-request$", "request"),
	("-bounces$", "bounces"),
	("-confirm$", "confirm"),
	("-join$", "join"),
	("-leave$", "leave"),
	("-subscribe$", "subscribe"),
	("-unsubscribe$", "unsubscribe"),
	)

	for i in types:
	if re.search(i[0], local):
	type = i[1]
	local = re.sub(i[0], "", local)

	if os.path.exists(local):
	os.execv(
	MailmanScripts + "/mail/mailman",
	(MailmanScripts + "/mail/mailman", type, local),
	)
	else:
	bounce()
	sys.exit(75)


	def bounce():
	bounce_message = """\
	TO ACCESS THE MAILING LIST SYSTEM: Start your web browser on
	http://%s/
	That web page will help you subscribe or unsubscribe, and will
	give you directions on how to post to each mailing list.\n"""
	sys.stderr.write(bounce_message % (sys.argv[1]))
	sys.exit(1)


	try:
	sys.exit(main())
	except SystemExit as argument:
	sys.exit(argument)

	except Exception as argument:
	info = sys.exc_info()
	trace = info[2]
	sys.stderr.write("%s %s\n" % (sys.exc_info()[0], argument))
	sys.stderr.write("Line %d\n" % (trace.tb_lineno))
	sys.exit(75) # Soft failure, try again later.

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