kopano-core/installer/linux/kopano-gateway.service

[Unit]
Description=Kopano Core IMAP/POP3 Gateway
Documentation=man:kopano-gateway(8) man:kopano-gateway.cfg(5)

[Service]
Type=simple
Environment=LC_ALL=C LANG=C
ExecStart=/usr/sbin/kopano-gateway -F
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target