I've set up a Postfix SMTP server on my Debian server and configured it to forward emails to my main email address using the
Sending and receiving emails works fine and emails addressed to non-existing users are rejected.
However, there are several users on the server that should not be able to receive emails. Is it possible to configure Postfix to reject emails to any user that is not mentioned in the virtual alias list (or some separate list, if that's easier)?
I've found some information on rejecting emails to specific users, but it would be much easier if I didn't have to add every user to a blacklist.