Hey there

I'm running Zimbra CS now for one year and I'm really happy with it. It's the
perfect Email-Server-Suite. Before I discovered Zimbra I was using Exim4
and Courier and I had always problems and Installtion was quite hard
compared to ZCS too

But now I have a problem, since a few weeks Gmail marks all the mails from
my Zimbra Server as Spam. I checked all Blacklists and tried to find out
something on the internet. Unfortunately with no results.

Can anyone of you guys tell me if there is something like a Gmail-Blacklist
and what I might have done to get on that list? I already wrote Google a mail
(not with my Zimbra-Email ) but as usual they didn't response.

Here are the raw header of the email which get marked as spam:
Code:
Delivered-To: xxx@gmail.com
Received: by 10.239.167.210 with SMTP id h18cs266513hbe;
        Tue, 30 Mar 2010 03:05:29 -0700 (PDT)
Received: by 10.87.64.38 with SMTP id r38mr7220829fgk.58.1269943528998;
        Tue, 30 Mar 2010 03:05:28 -0700 (PDT)
Return-Path: <oliver@igang.net>
Received: from ferdl.igang.net (ferdl.igang.net [78.47.67.59])
        by mx.google.com with ESMTP id e20si458208fga.26.2010.03.30.03.05.28;
        Tue, 30 Mar 2010 03:05:28 -0700 (PDT)
Received-SPF: pass (google.com: best guess record for domain of oliver@igang.net designates 78.47.67.59 as permitted sender) client-ip=78.47.67.59;
Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of oliver@igang.net designates 78.47.67.59 as permitted sender) smtp.mail=oliver@igang.net
Received: from localhost (ferdl.igang.net [78.47.67.59])
	by ferdl.igang.net (Postfix) with ESMTP id E480E1600002
	for <xxx@gmail.com>; Tue, 30 Mar 2010 12:05:27 +0200 (CEST)
X-Virus-Scanned: amavisd-new at mail.igang.net
Received: from ferdl.igang.net ([78.47.67.59])
	by localhost (ferdl.igang.net [78.47.67.59]) (amavisd-new, port 10024)
	with ESMTP id BHm3mMg3Nbbd for <xxx@gmail.com>;
	Tue, 30 Mar 2010 12:05:23 +0200 (CEST)
Received: from ferdl.igang.net (ferdl.igang.net [78.47.67.59])
	by ferdl.igang.net (Postfix) with ESMTP id E7D271600001
	for <xxx@gmail.com>; Tue, 30 Mar 2010 12:05:22 +0200 (CEST)
Date: Tue, 30 Mar 2010 12:05:22 +0200 (CEST)
From: "Oliver J. Sommer" <oliver@igang.net>
To: xxx@gmail.com
Message-ID: <31166711.17061269943522526.JavaMail.javamailuser@localhost>
Subject: I'm not a SPAM!
MIME-Version: 1.0
Content-Type: multipart/alternative; 
	boundary="----=_Part_860_7504535.1269943522518"
X-Originating-IP: [86.59.68.138]
X-Mailer: Zimbra 5.0.14_GA_2850.DEBIAN4.0 (ZimbraWebClient - SAF3 (Mac)/5.0.14_GA_2850.DEBIAN4.0)

------=_Part_860_7504535.1269943522518
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit

Truely! 
------=_Part_860_7504535.1269943522518
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 7bit

<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Truely!</div></body></html>
------=_Part_860_7504535.1269943522518--
I would really appreciate any help. I have no clue what happened.

Thanks and greetings from Austria,
Oliver