Hi, I have VPS installed on GCP (Google Cloud Platform) and the hostname/FQDN is indoprinting.us-central1-c.c.winged-verbena-331302.internal. On GCP, altering hostname is not allowed, even if you can change the hostname, it will revert back to default like first installation.
So, my question is why Mail Server plugin didn't detect indoprinting.us-central1-c.c.winged-verbena-331302.internal as valid FQDN (Fully Qualified Domain Name) while on cPanel/WHM is valid.
Thank you.

