I'm install Zimbra6.0 on ubuntu server 9.04, I can not resolve the problem.

this is file log (zimbra.log)
Oct 20 22:36:10 server1 postfix/smtpd[9096]: connect from server1.mydoamin.com[1.2.3.4]
Oct 20 22:36:10 server1 postfix/smtpd[9096]: C232C15238C: client=server1.myadmin.com[1.2.3.4]
Oct 20 22:36:10 server1 postfix/cleanup[26422]: C232C15238C: message-id=<4196998.871256052970668.JavaMail.root@server1>
Oct 20 22:36:10 server1 postfix/smtpd[9096]: disconnect from server1.mydomain.com[1.2.3.4]
Oct 20 22:36:10 server1 postfix/qmgr[18910]: C232C15238C: from=<kimloan@mydomain.com>, size=15980, nrcpt=1 (queue active)
Oct 20 22:36:10 server1 amavis[29777]: (29777-01) ESMTP::10024 /opt/zimbra/data/amavisd/tmp/amavis-20091020T223610-29777: <kimloan@mydomain.com> -> <nam@mydomain.com> SIZE=15980 Received: from mydomain.com ([127.0.0.1]) by localhost (mydomain.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP for <nam@mydomain.com>; Tue, 20 Oct 2009 22:36:10 +0700 (ICT)
Oct 20 22:36:10 server1 amavis[29777]: (29777-01) Checking: V4tDwjgYGpv0 [1.2.3.4] <kimloan@mydomain.com> -> <nam@mydomain.com>
Oct 20 22:36:10 server1 postfix/smtp[26423]: C232C15238C: to=<nam@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.13, delays=0.03/0.01/0.01/0.09, dsn=4.4.2, status=deferred (lost connection with 127.0.0.1[127.0.0.1] while sending end of data -- message may be sent more than once)
Oct 20 22:36:38 server1 postfix/anvil[19858]: statistics: max connection rate 1/60s for (smtp:210.245.37.211) at Oct 20 22:26:49
Oct 20 22:36:38 server1 postfix/anvil[19858]: statistics: max connection count 1 for (smtp:210.245.37.211) at Oct 20 22:26:49
Oct 20 22:36:38 server1 postfix/anvil[19858]: statistics: max cache size 2 at Oct 20 22:28:30


thanks you everyone!!!