giga328 ioir747hotmailcom matus uhlar fantomas wrote weve similar problem caused clients smtp authentication sent mail clients really sending mail outlook express destination server use servers primary mx outgoing smtp hi matus know smtp auth project split two phases first one replace old equipment new one second ask users start using smtp auth timeframe fortunately separate smtp servers mx clients would like configure spamassassin trust users relayed mtaout1isppttrs example regards giga view message context httpwwwnabblecomall_trustedanddos_oe_to_mxtp15659736p15669827html sent spamassassin users mailing list archive nabblecom thu 07 aug 2008 151732 0800 all_trusted dos_oe_to_mx