Hello Friends,

Before few months I had same problem like internal domain mails were going into junk and I had upgraded the version from FOSS 5.0.18 to FOSS 6.0.3 and it was resolved but again I am facing the same problem.Below is the mail header of one of my mail:

Return-Path: user@mydomain.com
Received: from mail.mydomain.com (LHLO mail.mydomain.com)
(172.16.10.18) by mail.mydomain.com with LMTP; Thu, 13 May 2010
06:03:11 +0530 (IST)
Received: from localhost (localhost [127.0.0.1])
by mail.mydomain.com (Postfix) with ESMTP id DB1166D47F9
for <user1@ mydomain.com>; Thu, 13 May 2010 06:03:11 +0530 (IST)
X-Virus-Scanned: amavisd-new at mydomain.com
X-Spam-Flag: YES
X-Spam-Score: 8.995
X-Spam-Level: ********
X-Spam-Status: Yes, score=8.995 tagged_above=-10 required=6.6
tests=[AWL=-2.035, BAYES_80=2, DNS_FROM_OPENWHOIS=1.13,
FH_DATE_PAST_20XX=3.188, RCVD_IN_BL_SPAMCOP_NET=1.96,
RCVD_IN_SORBS_WEB=0.619, RCVD_IN_XBL=3.033, RDNS_NONE=0.1,
DSPAM:Innocent=-1.000] autolearn=spam
Received: from mail.mydomain.com ([127.0.0.1])
by localhost (mail.mydomain.com [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id SSYhvWP5jT2s; Thu, 13 May 2010 06:03:07 +0530 (IST)
Received: from mail.mydomain.com (mail.mydomain.com [172.16.10.18])
by mail.mydomain.com (Postfix) with ESMTP id 40FA16D4062
for <user1@mydomain.com>; Thu, 13 May 2010 06:03:07 +0530 (IST)
Date: Thu, 13 May 2010 06:03:07 +0530 (IST)
From: user <user@mydomain.com>
To: user1 <user1@mydomain.com>
Message-ID: <26073913.7517.1273710787176.JavaMail.root@mail.my domain.com>
Subject: SUN Virtual
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Originating-IP: [xxx.xxx.xxx.xxx]
X-Mailer: Zimbra 6.0.3_GA_1915.SuSEES10 (ZimbraWebClient - IE8 (Win)/6.0.3_GA_1915.SuSEES10)

Pls let me know if more informations are needed.

Thanks