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Edit File: fastmail.service

[Unit] Description=Fastmail Services After=network.target network-online.target ConditionFileIsExecutable=/usr/local/cpanel/scripts/fastmail [Service] Type=oneshot # each new start should run a new instance RemainAfterExit=no ExecStart=/usr/local/cpanel/scripts/fastmail --all [Install] WantedBy=multi-user.target