text_combined: victor duchovni dxdewmdieulnutmorganstanleycom tue feb 26 2008 120238pm 0300 damian rivas wrote try something like recipient restrictions ill show little complete example based config smtpd_recipient_restrictions reject_unauth_destination reject_unknown_recipient_domain without reject_unknown_recipient_domain unless relay_domains contains implicitly explicitly subdomains given domain good idea recipient validation tends difficult case viktor disclaimer offlist followups get onlist replies get ignored please ignore replyto header unsubscribe postfixusers list visit httpwwwpostfixorglistshtml click link response solves problem best way thank send worked thanks followup must respond please put worked thanks subject delete quickly thu 07 aug 2008 220931 0500 rv problems postfix configuration check_relay_domains reject_rbl_client