MOON

File: //proc/thread-self/root/etc/systemd/system/exim.service

[Unit]
ConditionPathExists=!/etc/eximdisable
Description=Exim is a Mail Transport Agent, which is the program that moves mail from one machine to another.
Wants=clamd.service spamd.service mailman.service

[Service]
Type=forking
EnvironmentFile=/etc/sysconfig/exim
PIDFile=/var/spool/exim/exim-daemon.pid
ExecStart=/usr/libexec/exim.daemon start
ExecReload=/usr/libexec/exim.daemon reload

[Install]
WantedBy=multi-user.target