smtpd-redirectd

SMTP redirect daemon for malconfigured proprietary email sending software.
git clone git://arztpraxis-lohmann.de/smtpd-redirectd
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smtpd-redirectd (1267B)

      1 #!/usr/bin/env python3
      2 # coding=utf-8
      3 #
      4 # (c) 2019-2026 Christoph Lohmann <20h@r-36.net>
      5 #
      6 # This file is published under the terms of the GPLv3.
      7 #
      8 
      9 import os
     10 import sys
     11 import getopt
     12 from aiosmtpd.controller import Controller
     13 import asyncore
     14 import time
     15 import subprocess
     16 
     17 class SMTPHandler:
     18 	async def handle_DATA(self, server, session, envelope):
     19 		peer = session.peer
     20 		mail_from = envelope.mail_from
     21 		rcpt_tos = envelope.rcpt_tos
     22 		data = envelope.content
     23 
     24 		msmtpcmd = "sudo -u praxis msmtp -t -C /home/praxis/.msmtprc"
     25 		msmtpproc = subprocess.Popen(msmtpcmd, shell=True, \
     26 			stdin=subprocess.PIPE, close_fds=True)
     27 		msmtpproc.stdin.write(data)
     28 		msmtpproc.stdin.close()
     29 		msmtpproc.wait()
     30 
     31 		return "250 OK"
     32 
     33 def usage(app):
     34 	app = os.path.basename(app)
     35 	print("usage: %s [-h]" % (app), file=sys.stderr)
     36 	sys.exit(1)
     37 
     38 def main(args):
     39 	try:
     40 		opts, largs = getopt.getopt(args[1:], "h")
     41 	except getopt.GetoptError as err:
     42 		print(str(err))
     43 		usage(args[0])
     44 
     45 	for o, a in opts:
     46 		if o == "-h":
     47 			usage(args[0])
     48 		else:
     49 			assert False, "unhandled option"
     50 
     51 	handler = SMTPHandler()
     52 	controller = Controller(handler, hostname="127.0.0.1", port=25)
     53 	controller.start()
     54 	while 1:
     55 		time.sleep(10)
     56 
     57 	return 0
     58 
     59 if __name__ == "__main__":
     60 	sys.exit(main(sys.argv))
     61