[Unit] Description=Sendmail Mail Transport Client After=syslog.target network.target sendmail.service BindTo=sendmail.service [Service] Type=forking PIDFile=/var/spool/clientmqueue/sm-client.pid ExecStartPre=/bin/touch /var/spool/clientmqueue/sm-client.pid ExecStartPre=/bin/chown smmsp:smmsp /var/spool/clientmqueue/sm-client.pid ExecStart=/usr/sbin/sendmail -Ac -q30m -L sm-cm [Install] WantedBy=multi-user.target