здравствуйте, пытался найти в чем разница и какие плюсы. кто может подсказать? )_

Jul 1 03:00:57 xx.xx.xx.xx postfix/local[25439]: 01213220089: to=<admin@example.com>, relay=local, delay=0.27, delays=0.11/0.1/0/0.06, dsn=5.1.1, status=bounced (unknown user: «admin»)

mydestination = $myhostname, $mydomain, localhost.$mydomain, localhost

убираю $mydomain

Jul 1 03:03:23 xx.xx.xx.xx postfix/smtpd[25608]: warning: hostname (FQDN xx.xx.xx.xx) does not resolve to address xx.xx.xx.xx Jul 1 03:03:23 xx.xx.xx.xx postfix/smtpd[25608]: connect from unknown[xx.xx.xx.xx] Jul 1 03:03:23 xx.xx.xx.xx postfix/smtp[25613]: warning: host mail.example.com[xx.xx.xx.xx]:25 greeted me with my own hostname (FQDN xx.xx.xx.xx) Jul 1 03:03:23 xx.xx.xx.xx postfix/smtp[25613]: warning: host mail.example.com[xx.xx.xx.xx]:25 replied to HELO/EHLO with my own hostname (FQDN xx.xx.xx.xx) Jul 1 03:03:23 xx.xx.xx.xx postfix/smtp[25613]: BF5DF220089: to=<postfixadmin@example.com>, relay=mail.example.com[xx.xx.xx.xx]:25, delay=0.03, delays=0.02/0/0.01/0, dsn=5.4.6, status=bounced (mail for example.com loops back to myself)

Не бейте палкой.

Main.cf - http://pastebin.com/TyVc4ZF2