People sending mail via smtp with autentification, using courier as relay. Is there a way to verify the sender's from address and reject messages not matching the smtp-username?
Nope.
pgp00000.pgp
Description: PGP signature
People sending mail via smtp with autentification, using courier as relay. Is there a way to verify the sender's from address and reject messages not matching the smtp-username?
pgp00000.pgp
Description: PGP signature