[Unit] Description=OpenDKIM DomainKeys Identified Mail (DKIM) Milter Documentation=man:opendkim(8) man:opendkim.conf(5) man:opendkim-genkey(8) man:opendkim-genzone(8) man:opendkim-testadsp(8) man:opendkim-testkey http://www.opendkim.org/docs.html After=network.target nss-lookup.target [Service] Type=forking PIDFile=/var/run/opendkim/opendkim.pid User=opendkim Group=milter UMask=0007 ExecStartPre=/usr/sbin/opendkim -P /var/run/opendkim/opendkim.pid -x /etc/opendkim.conf -ln ExecStart=/usr/sbin/opendkim -P /var/run/opendkim/opendkim.pid -x /etc/opendkim.conf -l Restart=on-failure ExecReload=/bin/kill -USR1 $MAINPID [Install] WantedBy=multi-user.target