Domain alias mail forward ?

[GaRCieLD]

Hello,

When I create a domain alias for some domain and then edit the alias, there is an option called "Enable Forward - yes/no" and "Forward to URL", but I don't know how to use it.

For example, I want:

domain1.com
with an alias domain1_alias.com

and I want that all the mails to info@domain1_alias.com go to the same acount in the main domain (info@domain1.com in the example)

This is the way? or can I make this hand-make? any advice?

Thanks!