[Unit] Description=Exim MTA (socket activated - inetd mode) Documentation=man:exim Documentation=https://exim.org/docs.html [Service] Type=exec # We can't use -odf, as this would ask exim to keep the connection # from the client open until the delivery is done ExecStart={{exim}} -bs StandardInput=socket StandardError=journal # Don't kill the delivery process we spawned as a child KillMode=process # If you do not need local deliveries, enabling the # next option can improve security #NoNewPrivileges=yes ProtectSystem=strict ReadWriteDirectories={{spooldir}} ReadWriteDirectories={{logdir}} Slice=exim.slice