[Unit]
Description=Courier ESMTP Daemon
Requires=authdaemond.service
After=authdaemond.service courier-courierfilter.service

[Service]
Type=forking
ExecStartPre=/usr/bin/sh -c "[ -d /var/run/courier ] || mkdir -p /var/run/courier && chown courier:courier /var/run/courier"
ExecStart=/usr/sbin/esmtpd start
ExecStop=/usr/sbin/esmtpd stop
PIDFile=/var/run/courier/esmtpd.pid

[Install]
WantedBy=multi-user.target