Alias table for domains hosted on different server

[Sanjay K. Patel]

We clean mail for multiple domains than forward them on to servers hosting
the mail for the domains.

We would like to have all incoming mail for certain domain check be checked
against a  alias list to see if the receiving address is a valid address or
not.

This will stop spammers from send mail to addresses like sdsdsd at domain.com

SKP