mat1010/postfix-python-policy-service

Basic sample project to create a custom Postfix policy service in Python.

postfix-python-policy-service

This is just an example policy service, written in python, to create a custom policy service for Postfix SMTP Access Policy Delegation

Example Postfix integration

Installation

git clone https://github.com/mat1010/postfix-python-policy-service.git /opt/postfix-python-policy-service

Test the script itself is working

echo sender=foo@bar.de | /opt/postfix-python-policy-service/policy.py && cat /tmp/python-policy-service.log

action=dunno

XX:XX:XX,XXX DEBUG Sender address: foo@bar.de
XX:XX:XX,XXX DEBUG {'sender': 'foo@bar.de'}

Postfix Configuration

master.cf

as unix socket

/etc/postfix/master.cf:
  ...
  policy  unix  -       n       n       -       0       spawn
    user=nobody argv=/opt/postfix-python-policy-service/policy.py
  ...

as tcp listener

 /etc/postfix/master.cf:
   127.0.0.1:9998  inet  n       n       n       -       0       spawn
     user=nobody argv=/opt/postfix-python-policy-service/policy.py

main.cf

as unix socket

/etc/postfix/main.cf:
  smtpd_recipient_restrictions =
      ...
      reject_unauth_destination
      check_policy_service unix:private/policy
      ...

as tcp listener

 /etc/postfix/main.cf:
   smtpd_recipient_restrictions =
       ...
       reject_unauth_destination
       check_policy_service inet:127.0.0.1:9998
       ...