[Postfixadmin-devel] Backup MX with Postfixadmin

[Fongaboo <pos...@fo...>]

I have my primary mail server running postfix with MySQL backend and 
PostfixAdmin front-end. Works as advertised.

For years my backup MX has just been configured to accept all mail for 
configured domains, and store-and-forward. But we know that hasn't been a 
good practice for a long time.

I have finally set up my backup MX with the same 
postfix/MySQL/postfixadmin stack as the primary. I see you can check off 
Backup MX as an option in Domains.

But I want to populate the backup MX with valid users so that anything 
else gets denied. How do you do that in a Postfixadmin setting?

Do aliases have to be created pointing to the same destination as is set 
on the primary?

How are addresses that are actual POP/IMAP mailboxes on the primary 
handled? Do you have to make an actual mailbox on the secondary? Or can 
you just make a matching alias? If the latter, what to point the aliases 
to?

Should I be planning to migrate the entire MySQL database as-is to the 
secondary server, but then have some script that sets backupmx=1?


TIA