[Unit]
Description=Exim MTA (daemon)
Documentation=man:exim
Documentation=https://exim.org/docs.html

Requires=network.target
After=networking.target

[Service]
Environment=DAEMON_OPTS=
Environment=QUEUE_OPTS=-q15m
EnvironmentFile=-/etc/default/exim

Type=exec
ExecStart=exim -bdf $DAEMON_OPTS $QUEUE_OPTS
ExecReload=kill -HUP ${MAINPID}

ProtectSystem=strict
ReadWriteDirectories=/var/spool/exim
ReadWriteDirectories=/var/log/exim

Slice=exim.slice

[Install]
WantedBy=multi-user.target