[Unit] Description = Milter module for the Clam Antivirus scanner After = syslog.target nss-lookup.target network.target Before = sendmail.service Before = postfix.service [Service] Type = simple ExecStart = /usr/sbin/clamav-milter -c /etc/mail/clamav-milter.conf --nofork=yes Restart = on-failure [Install] WantedBy = multi-user.target