550 ошибка при отправку Email

Всем привет задался вопросом отправки уведомлений о голосовом сообщении в логах сяптся такие ошибки:

Mar 26 13:08:45 localhost master[24770]: about to exec /usr/lib/cyrus-imapd/squatter
Mar 26 13:08:45 localhost master[24771]: about to exec /usr/lib/cyrus-imapd/ctl_cyrusdb
Mar 26 13:08:45 localhost squatter[24770]: indexing mailboxes
Mar 26 13:08:45 localhost squatter[24770]: done indexing mailboxes
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: checkpointing cyrus databases
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: archiving log file: /var/lib/imap/db/log.0000000001
Mar 26 13:08:45 localhost master[2656]: process 24770 exited, status 0
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: archiving log file: /var/lib/imap/db/log.0000000001
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: archiving database file: /var/lib/imap/annotations.db
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: archiving database file: /var/lib/imap/mailboxes.db
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: archiving log file: /var/lib/imap/db/log.0000000001
Mar 26 13:08:45 localhost ctl_cyrusdb[24771]: done checkpointing cyrus databases
Mar 26 13:08:45 localhost master[2656]: process 24771 exited, status 0
Mar 26 13:09:14 localhost postfix/pickup[21135]: 12DE13D3091D: uid=100 from=<asterisk>
Mar 26 13:09:14 localhost postfix/cleanup[24787]: 12DE13D3091D: message-id=<Asterisk-11-1164478381-120-2891@astser>
Mar 26 13:09:14 localhost postfix/qmgr[2831]: 12DE13D3091D: from=<asterisk@astser.localdomain>, size=796, nrcpt=1 (queue active)
Mar 26 13:09:14 localhost postfix/smtp[24790]: 12DE13D3091D: to=<test@mail.ru>, relay=mxs.mail.ru[94.100.176.20]:25, delay=0.23, delays=0.04/0.01/0.15/0.04, dsn=5.0.0, status=bounced (host mxs.mail.ru[94.100.176.20] said: 550 Unroutable sender address (in reply to MAIL FROM command))
Mar 26 13:09:14 localhost postfix/cleanup[24787]: 541BC3D3094A: message-id=<20120326090914.541BC3D3094A@astser.localdomain>
Mar 26 13:09:14 localhost postfix/qmgr[2831]: 541BC3D3094A: from=<>, size=2719, nrcpt=1 (queue active)
Mar 26 13:09:14 localhost postfix/bounce[24791]: 12DE13D3091D: sender non-delivery notification: 541BC3D3094A
Mar 26 13:09:14 localhost postfix/qmgr[2831]: 12DE13D3091D: removed
Mar 26 13:09:14 localhost postfix/local[24792]: 541BC3D3094A: to=<asterisk@astser.localdomain>, relay=local, delay=0.03, delays=0.01/0.02/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
Mar 26 13:09:14 localhost postfix/qmgr[2831]: 541BC3D3094A: removed

подскажите что нужно сделать, я так понял сервер не может разрезолвить имя астериска или что?