File: //lib/systemd/system/spamd.service
[Unit]
Description=Perl-based spam filter using text analysis
After=network-online.target
[Service]
Type=simple
PIDFile=/run/spamd.pid
EnvironmentFile=-/etc/default/spamd
ExecStart=/usr/sbin/spamd --pidfile=/run/spamd.pid $OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
StandardOutput=null
StandardError=null
Restart=always
ProtectSystem=full
PrivateTmp=true
PrivateDevices=true
ProtectHostname=true
ProtectClock=true
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectKernelLogs=true
ProtectControlGroups=true
RestrictNamespaces=true
LockPersonality=true
RestrictRealtime=true
RestrictSUIDSGID=true
[Install]
WantedBy=multi-user.target