[Unit] Description=Random transport helper for Postfix After=network.target [Service] Type=simple #PIDFile=/run/random-transport.pid ExecStart=/usr/sbin/random-transport Restart=on-failure User=nobody Group=nogroup NoNewPrivileges=true PrivateDevices=true PrivateTmp=true ProtectHome=true #ProtectKernelModules=true [Install] WantedBy=multi-user.target