[Unit] Description=Sendmail Mail Transport Agent After=syslog.target network.target Wants=sm-client.service [Service] Type=forking PIDFile=/run/sendmail.pid ExecStartPre=-/usr/bin/newaliases ExecStartPre=-/bin/rm -f /var/spool/mqueue/xf* ExecStart=/usr/sbin/sendmail -bd -q30m -L sm-mta [Install] WantedBy=multi-user.target Also=sm-client.service