I have successfully accomplished this by setting the
virtual_mailbox_domains in postfix + $config['default_host'] in
However, depending on what username does the user uses 2 separate
entries gets created for him in the DB with 2 settings.
This is problematic because I would like to add automatic address
collection, vacation and other things which then will be binded to 2
accounts, depending on which format does the user uses to login.