Can IMAP/SMTP domain be different from sender domain?

[curtiser]

Since I’ll have to upgrade mailinabox to a new Ubuntu 22.04 server, I want to make some changes. Domains A.com and B.com will be moved to the server with a new IP address on that box.

I have multiple sender domains (A.com, B.com) and IMAP/SMTP are pointing to mail.A.com. It doesn’t make sense to B.com users. I want to fix this.

So I am thinking I should create C.com to be the IMAP/SMTP domain and A.com and B.com users will connect to mail.C.com as the mail server.

Is it possible within mailinabox configuration? Thanks.

Curtis

[alento]

@curtiser

Is it possible within mailinabox configuration? Thanks.

You can use any valid hostname for any domain that you control.
(Within reason, www would be a bad choice for example).

What you are referring to as the “IMAP/SMTP domain” is actually the mail server “hostname”.