Hi all,
Exchange uses Message-ID set by the originating mail server to recognize
duplicates. The Message-ID is part of the header of each mail. Exchange does
not reject the message, but suppresses delivery to the destination mailbox, if
a duplicate is found. The Exchange Log says "Duplicate".
So, it is not the Message-ID set by the MailScanner Gateway but the Message-ID
of the originating mail server.
Example headers:
Received: from mail.tdss.co.za (mail.tdss.co.za [174.136.108.85]) by
mx1.mailmind.de (8.13.8/8.13.8) with ESMTP id p1O5Vxfb001429
(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO)
for
<[email protected]>; Thu, 24 Feb 2011 06:32:01 +0100
Received: from dexter.tdss.co.za (dexter.tdss.co.za [127.0.0.1]) by
mail.tdss.co.za (Postfix) with ESMTP id 826721A44DE; Thu, 24 Feb 2011
07:31:57 +0200 (SAST)
X-DKIM: Sendmail DKIM Filter v2.8.3 mail.tdss.co.za 826721A44DE
X-Original-To: [email protected]
Delivered-To: [email protected]
Received: from [192.168.1.50] (196-215-121-81.dynamic.isadsl.co.za
[196.215.121.81]) (using TLSv1 with cipher AES128-SHA (128/128 bits))
(No
client certificate requested) by mail.tdss.co.za (Postfix) with ESMTP id
BFF171A44CA for <[email protected]>; Thu, 24 Feb 2011 07:31:53 +0200
(SAST)
X-DKIM: Sendmail DKIM Filter v2.8.3 mail.tdss.co.za BFF171A44CA
MIME-Version: 1.0 (Apple Message framework v1082)
From: Andrew Colin Kissa <[email protected]>
In-Reply-To: <[email protected]>
Date: Thu, 24 Feb 2011 07:31:47 +0200
Message-ID: <[email protected]>
^^^^^It is this line in the header, Exchange uses to recognize duplicates.
Regards,
Roland
________________________________________
Von: [email protected] [[email protected]]" im
Auftrag von "Andrew Colin Kissa [[email protected]]
Gesendet: Donnerstag, 24. Februar 2011 06:31
Bis: Baruwa users list
Betreff: Re: [Baruwa] Some more questions regarding baruwa
On 23 Feb 2011, at 9:40 PM, Ehle, Roland wrote:
> The original Message-ID from the Linux system changes, but there is a
> Message-ID in the header of the mail like
> "Message-ID:<17AE017C28FC8B41992273ABDABE80C746BDA251@Exchange.exchangehost.local>"
> and Exchange 2010 takes this Message-ID to identify duplicates.
Why is exchange generating a message id for a message that already has a
message id ? Are you saying the message now has two message id's ?
If so what is this duplicate suppression system that exchange uses based on
message hash, headers or the checksum of the body as it seems not to use the
message id as you have previously indicated ?
--
Baruwa - www.baruwa.org
_______________________________________________
Baruwa mailing list
[email protected]
http://lists.baruwa.org/mailman/listinfo/baruwa
_______________________________________________
Baruwa mailing list
[email protected]
http://lists.baruwa.org/mailman/listinfo/baruwa
