What is the right way to setup an alias mail server?

Help! (Home for newbies)
1

I have a virtual server for mail.

If I add an alias to that server will mail @that-domain = @the-master?

If that is so, then that is what I want however I cannot create an SSL for an alias (to ultimately redirect to the the-master without an SSL error).

If I create a sub-server I can add an SSL, but its seems like it’s going to create separate mail and website and everything. I can redirect the website but what will the mail look like?

What I am after is:

https://mail.alias-server → https://mail.master-server

and mail to @alias-server is the same as mail to @master-server (with SSL/TLS options implied at mail.alias-server etc)

Thanks

SYSTEM INFORMATION
OS type and version Ubuntu 24.04.4
Virtualmin version 7.50.0
2

In a word, yes

3

Yep, thanks, works good.

I was confused because “Mail for domain” is an alias checkbox which I thought might mean “separate email addresses” and not aliases of the same box (it does what I want where @one.com = @theother.com) , and also about the SSL… which all I needed to do for was add the alias, then then I could Let’s Encrypt both with one certificate.