[email protected]: > I asked a friend of mine who runs a ISP with EIMS (Eudora Internet Mail > Server): He says he can easily tell the server to distinguish between > SMTP submission and remote SMTP requests:
Postfix uses permit_mynetworks to authorize "local" clients for
things that "remote" clients aren't allowed to do (like mail
relaying).
Similar Postfix features are permit_sasl_authenticated and
reject_plaintext_session.
Wietse
