[Unit] Description=Postfix MTA After=syslog.target local-fs.target network.target mysqld.service dovecot.service [Service] Type=forking ExecStart=/usr/sbin/postfix -c /etc/postfix start ExecStop=/usr/sbin/postfix -c /etc/postfix stop ExecReload=/usr/sbin/postfix -c /etc/postfix reload Restart=always RestartSec=2 [Install] WantedBy=multi-user.target