I have one domain example.com
Some mail coming to my postfix server will need to be delivered local and the rest to an internal mail server.
is in the alias file to go to root
is not in the alias file and needs to be relayed to the internal server.
The internal mail server is mail.example.com where there is no email@example.com
but there is a firstname.lastname@example.org
Is it possible to configure postfix to do this?