> unverified_recipient_reject_reason = User unknown > unverified_sender_reject_reason = User unknown
Please disable these two settings, for example: $ postconf -# unverified_recipient_reject_reason unverified_sender_reject_reason $ postfix reload and report the logs of the problem with these settings. I need to know the true reason why the request is rejected, not the text that you configured in main.cf. Wietse