Разбираюсь с postfix. Настроил, отправляю почту руту через mailx. В логах:
Nov 17 22:37:04 mx postfix/pickup[761]: 3E3DF28382B: uid=0 from=<root>
Nov 17 22:37:04 mx postfix/pickup[761]: 3E3DF28382B: uid=0 from=<root>
Nov 17 22:37:04 mx postfix/cleanup[766]: 3E3DF28382B: message-id=<20121117143704.3E3DF28382B@mx.domain.local>
Nov 17 22:37:04 mx postfix/cleanup[766]: 3E3DF28382B: message-id=<20121117143704.3E3DF28382B@mx.domain.local>
Nov 17 22:37:04 mx postfix/qmgr[762]: 3E3DF28382B: from=<root@domain.local>, size=310, nrcpt=1 (queue active)
Nov 17 22:37:04 mx postfix/qmgr[762]: 3E3DF28382B: from=<root@domain.local>, size=310, nrcpt=1 (queue active)
Nov 17 22:37:04 mx postfix/local[768]: 3E3DF28382B: to=<root@domain.local>, orig_to=<root>, relay=local, delay=0.11, delays=0.07/0/0/0.04, dsn=2.0.0, status=sent (delivered to mailbox)
Nov 17 22:37:04 mx postfix/local[768]: 3E3DF28382B: to=<root@domain.local>, orig_to=<root>, relay=local, delay=0.11, delays=0.07/0/0/0.04, dsn=2.0.0, status=sent (delivered to mailbox)
Nov 17 22:37:04 mx postfix/qmgr[762]: 3E3DF28382B: removed
Nov 17 22:37:04 mx postfix/qmgr[762]: 3E3DF28382B: removed
gentoo amd64, postfix 2.9.4, конфиг http://bpaste.net/show/50BVTWoPxTQPMeb5r3cJ/