Hello, I’m trying to implement a certain setup which includes two hostnames - one (internal.example.com), which is used on mailcow’s SMTP and is later relayed through an additional SMTP server (mail.example.com), and another (mail.example.com), which is front-facing for the web interface and SMTP.
How can I set the hostname used in all web UI profiles to mail.example.com, but send messages with internal.example.com?