Hi @ll, i have a relay for exchange which is configured with reject_sender_login_mismatch with accounts allowed to send out for configured domains at last a infected host generated a faked sender which was rejected with not owned by user unfourtunally the bounce goes to the faked sender then this is the nature of backscatter any idea how to stop bounce in that case
i thought of something like ( not the right syntax here only as principal example) discard "Sender address rejected: not owned by user*" mails in /etc/postfix/header_checks any better idea? -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
