>Логи и конфиги покажи...
кусок лога(maillog), что навеяло печаль:
Feb 3 02:29:53 my_gate sm-mta[8041]: alias database /etc/mail/aliases.db out of date
Feb 3 02:29:53 my_gate sm-mta[8041]: i12MJaCr008041: collect: premature EOM: unexpected close
Feb 3 02:29:53 my_gate sm-mta[8041]: i12MJaCr008041: collect: unexpected close on connection from vanish.yandex.ru, sender=<nd@yandex.ru>
Feb 3 02:29:53 my_gate sm-mta[8041]: i12MJaCr008041: from=<nd@yandex.ru>, size=0, class=0, nrcpts=1, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=vanish.yandex.ru [213.180.200.4]
Feb 3 02:29:53 my_gate drweb-smf: [i12MJaCr008041]: message from nd@yandex.ru is aborted
еще:
Feb 3 09:36:45 my_gate sendmail[14179]: i135aPcS014179: SYSERR(uucp): MX list for my_domain.my_domain.ru. points back to my_gate.my_domain.ru
Feb 3 09:36:45 my_gate sendmail[14179]: i135aPcS014179: i135aPcT014179: DSN: MX list for my_domain.my_domain.ru. points back to my_gate.my_domain.ru
и еще:
Feb 3 14:22:03 my_gate sm-mta[253]: alias database /etc/mail/aliases.db out of date
Feb 3 14:22:03 my_gate sm-mta[253]: i13AAYS3000253: collect: premature EOM: unexpected close
Feb 3 14:22:03 my_gate sm-mta[253]: i13AAYS3000253: collect: unexpected close on connection from mailhub.sibbereg.ru, sender=<denisov@samara.sibbereg.ru>
Feb 3 14:22:03 my_gate sm-mta[253]: i13AAYS3000253: from=<denisov@samara.sibbereg.ru>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=mailhub.sibbereg.ru [81.1.214.227]
Feb 3 14:22:03 my_gate drweb-smf: [i13AAYS3000253]: message from denisov@samara.sibbereg.ru is aborted