victor duchovni dxdewmdieulnutmorganstanleycom wed feb 13 2008 020317am 0100 andras galos wrote seems safe way filter mail fake mx connection established rcpt fake mx fake connections say goodbye many spam knock wrong door right way nolisting primary mx host returns tcp rst connections lower preference real mx host want bogus mx hosts end mx list make sure also return rst timeout dont use greylisting primary mx connections secondary rare use greylisting whitelist machines pass rapidly dont greylisted first connections 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 tue 05 aug 2008 224341 0500 postfix fake mx