Opensuse :postfix error: sender non-delivery notification , Email bounced

[xlimonta]

Jul 9 10:48:22 loki postfix/qmgr[3635]: 952866272C: from=<123@ccron.cu>, size=506, nrcpt=1 (queue active)
Jul 9 10:48:22 loki roundcube: User 123@ccron.cu [192.168.30.191]; Message for postmaster@ccron.cu; 250: 2.0.0 Ok: queued as 952866272C
Jul 9 10:48:22 loki postfix/smtp[17497]: 952866272C: to=<postmaster@ccron.cu>, relay=none, delay=0.33, delays=0.15/0.17/0.01/0, dsn=5.4.6, status=bounced (mail for ccron.cu loops back to myself)
Jul 9 10:48:22 loki postfix/cleanup[17490]: EDB1162739: message-id=<20130709144822.EDB1162739@loki.ccron.cu>
Jul 9 10:48:23 loki postfix/qmgr[3635]: EDB1162739: from=<>, size=2259, nrcpt=1 (queue active)
Jul 9 10:48:23 loki postfix/bounce[17499]: 952866272C: sender non-delivery notification: EDB1162739
Jul 9 10:48:23 loki postfix/qmgr[3635]: 952866272C: removed
Jul 9 10:48:23 loki postfix/smtp[17497]: EDB1162739: to=<123@ccron.cu>, relay=none, delay=0.07, delays=0.03/0.02/0.02/0, dsn=5.4.6, status=bounced (mail for ccron.cu loops back to myself)
Jul 9 10:48:23 loki postfix/qmgr[3635]: EDB1162739: removed
Jul 9 10:48:23 loki postfix/smtpd[17487]: disconnect from localhost[127.0.0.1]

Please some body , help me about, this mail, work fine sending mail to outside, but e-mail form outdoor and internal, don't have delivery notification, please help me
Sorry for my ugly English.

Tks a lot

Here is a config files: