[Unit] Description=Postfix Greylisting Service Before=postfix.service [Service] Type=forking PIDFile=/run/postgrey/postgrey.pid ExecStart=/usr/bin/postgrey --inet=127.0.0.1:10030 \ --pidfile=/run/postgrey/postgrey.pid \ --group=postgrey --user=postgrey \ --daemonize \ --greylist-text="Greylisted for %%s seconds" Restart=always RestartSec=5 TimeoutSec=10 [Install] WantedBy=multi-user.target