i have problem on postfix mail server.
i want to implement user restrictions on my domain
are my email users in my server
i want to restrict user1 and user2
from sending and recieving to/from
its own domain w/c is @domain.com
and denied to elsewhere
while user3 and user4 and send & recieve freely
to/from the internet.
can you please give me a sample configuration
in main.cf whoever implemented this kind of