Missing headers in mailscanner

[Wim Bakker]

Hello,

recently I installed mailscanner on a testserver to
obtain information on it's behaviour.
Setup:

postfix-2.3.xx , mailscanner with recommended tarball
for clamav and spamassassin.
Mailwatch as webfrontend to mailscanner.
The machine was then configured to accept mail for and
transport mail after scanning to another server
for a testmaildomain and after altering the MX records for that 
testdomain the test begun.

Mail directly sent at the accounts in the testmaildomain
were processed ok , spamchecking and virus scanning went
ok and mail was transported correctly to the destination
mailserver.

To increase the amount of mail that had to be processed,
I made an extra transport entry on another mailserver
where I have an account to forward all mail to that
account to one of the accounts on the testmaildomain.
So :
destination at maildomain.nl was transported to
destination at testmaildomain.nl and that is where things became annoying.
A lot of mail that  came in from the transport was
stripped from the subject line , the to line and
was unreadable. Why would this happen ?
Allso I note that mail that is regarded as spam
gets a subject rewrite to :
{ spam? } <orig. subject>  (with a lot of times the orig_subject 
disappearing)
where does the "{ spam? }" come from, I certainly don't have it in
my spam.assassin.prefs.conf because I don't want a subject rewrite.
Apart from these not so minor glitches the system works
perfect, so I really would like to know why this happens in the
case of a transport from another server.
Example of headers from a unreadable mail :
-------------------------------
Return-Path: <kolab-devel-bounces at kolab.org>
Received: from mail.bhagwato.eu ([unix socket])
          by www.bhagwato.eu (Cyrus v2.3.3) with LMTPA;
          Sun, 01 Apr 2007 14:11:11 +0200
X-Sieve: CMU Sieve 2.3
Received: from mx1.unetix.nl (mx1.unetix.nl [194.109.108.70])
         by mail.bhagwato.eu (Postfix) with ESMTP id A943424291B4
         for <wim at bhagwato.eu>; Sun,  1 Apr 2007 14:11:11 +0200 (CEST)
Received: from mailgateway.unetix.nl (unknown [213.84.10.61])
         by mx1.unetix.nl (Postfix) with ESMTP id 6096E303F6F7
         for <wim at bhagwato.eu>; Sun,  1 Apr 2007 14:11:02 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1])
         by mailgateway.unetix.nl (Postfix) with ESMTP id D64B220DF45;
         Sun,  1 Apr 2007 14:11:34 +0200 (CEST)
Received: from mailgateway.unetix.nl (localhost [127.0.0.1])
         by mailgateway.unetix.nl (Postfix) with SMTP id C2D4020DF42;
         Sun,  1 Apr 2007 14:11:34 +0200 (CEST)
Received: from mailgateway.unetix.nl ([127.0.0.1])
         by mailgateway.unetix.nl ([192.168.253.1])
         with SMTP (gateway) id A05F129EE8C; Sun, 01 Apr 2007 14:11:34 +0200
Received: by mailgateway.unetix.nl (Postfix, from userid 1001)
         id 950C720DF46; Sun,  1 Apr 2007 14:11:34 +0200 (CEST)
X-Spam-Checker-Version: SpamAssassin 3.1.7 (2006-10-05) on
         mailgateway.unetix.nl
X-Spam-Level:
MIME-Version: 1.0
X-unetix.nl-MailScanner-Information: Please contact the ISP for more 
information
X-unetix.nl-MailScanner: Found to be clean
X-unetix.nl-MailScanner-SpamCheck: spam, SpamAssassin (not cached,
         score=9.402, required 3.3, BAYES_99 2.00, BODY_ENHANCEMENT2 0.74,
         FORGED_RCVD_HELO 0.14, J_CHICKENPOX_47 1.60, J_CHICKENPOX_73 1.60,
         MISSING_HB_SEP 2.50, MISSING_SUBJECT 0.70, TO_CC_NONE 0.13)
X-unetix.nl-MailScanner-SpamScore: sssssssss
X-unetix.nl-MailScanner-From: kolab-devel-bounces at kolab.org
Subject: {Spam?}
X-Spam-MX1: Yes
Message-Id: <20070401121111.A943424291B4 at mail.bhagwato.eu>
Date: Sun,  1 Apr 2007 14:11:11 +0200 (CEST)
From: kolab-devel-bounces at kolab.org
To: undisclosed-recipients:;
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