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Distribution List Recipients Receive 2 or 3 copies of an email

Posted on 2006-07-17
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Last Modified: 2010-03-06

Howdy,

We have recently set up a distribution list in our Exchange Server.  When we sent an email to it some but not all get mutiple copies.  Some get 2 and some get 3.  Some might get more than that but I am not sure about it.

Here is the detail.

Config :-  Exchange 2003 Enterprise SP1, Windows 2000 Native Domain, Outlook 2003 (internal Clients), Single Site / Domain.

We have a Global Distribution object.  We have set up 78 Contact objects with email addresses that are external to our Exchange Server and 1 mailbox on our Exchange Server.
The addresses external to our Exchange Server are a wide mix of addreses but there are a few going to the same company and a few going to hotmail even.

An email is sent from an external mailbox to the Distribution list which then sends it to everyone.  It is difficult to do more testing as I do not want to Spam the recipients.

Even the Hotmail users got multiple copies.


Help?


Cheers

0
Comment
Question by:valpak
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4 Comments
 
LVL 104

Expert Comment

by:Sembee
ID: 17120989
You need to get your hands on the full message headers of the duplicated messages. Preferably all of the messages received.
I would expect that you will find that one of them is different to the others.
There will be the original message that you have sent, then there will be the duplicate, which is probably coming from elsewhere.

One of the recipients is probably using an SBS server with the POP3 connector that hasn't been updated. There was a bug in original release that caused this kind of behaviour. You are lucky you only got two or three duplicates. I have seen 100s in the past.

Simon.
0
 

Author Comment

by:valpak
ID: 17121311

Howdy,

I have copies of the message headers that arrived at my hotmail address.  One of them has mention of "Global POP3 Download" that the other doesn't.

I have tried sending to a smaller list but it does not happen and my co-worker has said that he a similar problem once where one users mail server had two connectors so it duplicated the emails to everyone on this list.

Anyways, here are the headers so any idea's?  The first one is what I would consider the duplicate as it was received second. (sanitised slightly :-)


X-SID-PRA: senderemail <senderemail@lineone.net>
X-SID-Result: TempError
X-Message-Info: LsUYwwHHNt06dD4Ws7ksFhvLTyTMxG0/PcknwjRu5oE=
Received: from exch2003.mydomain.local ([80.169.159.2]) by bay0-mc4-f18.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2444);
       Mon, 10 Jul 2006 01:12:53 -0700
Received-SPF: none (Exclaimer: 195.74.118.21 is neither permitted nor denied by domain of lineone.net) client-ip=195.74.118.21; envelope-from=senderemail@lineone.net; helo=cfd-dc.CFD.local;
thread-index: Acaj+No7yN6g++l1SYWQQzHnFt3roA==
Received: from cfd-dc.CFD.local ([195.74.118.21]) by exch2003.mydomain.local with Microsoft SMTPSVC(5.0.2195.6713); Mon, 10 Jul 2006 09:14:22 +0100
Received: from cfd-dc.CFD.local ([192.168.10.253]) by cfd-dc.CFD.local with Microsoft SMTPSVC(5.0.2195.6713); Mon, 10 Jul 2006 09:07:03 +0100
Received: by cfd-dc.CFD.local (Microsoft Connector for POP3 Mailboxes 5.00.2195) with SMTP (Global POP3 Download) id MSG07102006-090702-19703.MMD@CFD.local; Mon, 10 Jul 2006 09:07:02 +0100
Return-Path: <senderemail@lineone.net>
Received: (qmail 18006 invoked by uid 508); 10 Jul 2006 09:00:24 +0100
Received: (qmail 18002 invoked by uid 508); 10 Jul 2006 09:00:24 +0100
Received: from unknown (HELO exch2003.mydomain.local) (80.169.159.2)  by host2.doc-net.com with SMTP; 10 Jul 2006 09:00:24 +0100
X-SPF-Result: 1
Received: from mk-smarthost-1.mail.uk.tiscali.com ([212.74.114.37]) by exch2003.mydomain.local with Microsoft SMTPSVC(5.0.2195.6713); Mon, 10 Jul 2006 09:01:53 +0100
Received: from 88-107-145-31.dynamic.dsl.as9105.com (HELO mk-smarthost-8.mail.uk.tiscali.com) ([88.107.145.31])  by mk-smarthost-1.mail.uk.tiscali.com with ESMTP; 10 Jul 2006 09:00:10 +0100
X-IronPort-Anti-Spam-Filtered: true
Content-Class: urn:content-classes:message
Importance: normal
Priority: normal
X-IronPort-Anti-Spam-Result: AR4FAJ6lsUSCdoMKDoQJLA
Content-Transfer-Encoding: 7bit
Received: from 88-107-145-31.dynamic.dsl.as9105.com ([88.107.145.31]:1704 helo=p3cube) by mk-smarthost-8.mail.uk.tiscali.com with smtp (Exim 4.30) id 1Fzqgb-000LJX-Lq for alerts@distributionlist.co.uk; Mon, 10 Jul 2006 08:00:09 +0000
Message-ID: <00bc01c6a3f6$dd518f70$1f916b58@p3cube>
From: "senderemail" <senderemail@lineone.net>
To: "Distribution List" <alerts@distributionlist.co.uk>
Subject: Test of new e mail address
Date: Mon, 10 Jul 2006 09:00:08 +0100
MIME-Version: 1.0
Content-Type: multipart/alternative;
      boundary="----=_NextPart_000_00B9_01C6A3FF.3E952EB0"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.2869
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1807
X-OriginalArrivalTime: 10 Jul 2006 08:01:53.0313 (UTC) FILETIME=[1B133110:01C6A3F7]




X-SID-PRA: senderemail <senderemail@lineone.net>
X-SID-Result: TempError
X-Message-Info: LsUYwwHHNt0rfB3JAz/vvkfhGuSSmWmw5LaFjsMVABQ=
Received: from bay0-mc11-f3.bay0.hotmail.com ([65.54.245.75]) by bay0-imc1-s9.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2444);
       Mon, 10 Jul 2006 01:01:36 -0700
Received: from exch2003.mydomain.local ([80.169.159.2]) by bay0-mc11-f3.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2444);
       Mon, 10 Jul 2006 01:01:35 -0700
X-SPF-Result: 1
Received-SPF: none (Exclaimer: 212.74.114.37 is neither permitted nor denied by domain of lineone.net) client-ip=212.74.114.37; envelope-from=senderemail@lineone.net; helo=mk-smarthost-1.mail.uk.tiscali.com;
thread-index: Acaj9xtRBrWhH/oeQi6dk4XHGgoFKQ==
Received: from mk-smarthost-1.mail.uk.tiscali.com ([212.74.114.37]) by exch2003.mydomain.local with Microsoft SMTPSVC(5.0.2195.6713); Mon, 10 Jul 2006 09:01:53 +0100
Received: from 88-107-145-31.dynamic.dsl.as9105.com (HELO mk-smarthost-8.mail.uk.tiscali.com) ([88.107.145.31])  by mk-smarthost-1.mail.uk.tiscali.com with ESMTP; 10 Jul 2006 09:00:10 +0100
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AR4FAJ6lsUSCdoMKDoQJLA
Content-Transfer-Encoding: 7bit
Received: from 88-107-145-31.dynamic.dsl.as9105.com ([88.107.145.31]:1704 helo=p3cube) by mk-smarthost-8.mail.uk.tiscali.com with smtp (Exim 4.30) id 1Fzqgb-000LJX-Lq for alerts@distributionlist.co.uk; Mon, 10 Jul 2006 08:00:09 +0000
Message-ID: <00bc01c6a3f6$dd518f70$1f916b58@p3cube>
From: "senderemail" <senderemail@lineone.net>
Content-Class: urn:content-classes:message
To: "Distribution List" <alerts@distributionlist.co.uk>
Importance: normal
Priority: normal
Subject: Test of new e mail address
Date: Mon, 10 Jul 2006 09:00:08 +0100
MIME-Version: 1.0
Content-Type: multipart/alternative;
      boundary="----=_NextPart_000_00B9_01C6A3FF.3E952EB0"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.2869
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1807
Return-Path: <senderemail@lineone.net>
X-OriginalArrivalTime: 10 Jul 2006 08:01:53.0313 (UTC) FILETIME=[1B133110:01C6A3F7]


Cheers
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LVL 104

Accepted Solution

by:
Sembee earned 500 total points
ID: 17121343
I was right.
It is a POP3 Connector doing the duplication.

Received: from cfd-dc.CFD.local ([195.74.118.21]) by exch2003.mydomain.local with Microsoft SMTPSVC(5.0.2195.6713); Mon, 10 Jul 2006 09:14:22 +0100
Received: from cfd-dc.CFD.local ([192.168.10.253]) by cfd-dc.CFD.local with Microsoft SMTPSVC(5.0.2195.6713); Mon, 10 Jul 2006 09:07:03 +0100
Received: by cfd-dc.CFD.local (Microsoft Connector for POP3 Mailboxes 5.00.2195) with SMTP (Global POP3 Download) id MSG07102006-090702-19703.MMD@CFD.local; Mon, 10 Jul 2006 09:07:02 +0100

You need to find out who cfd-dc.cfd.local is and ask them to get their server looked at.

Simon.
0
 

Author Comment

by:valpak
ID: 17121493

And lo and behold - one of the people on the list can be seen to use the initials CFD.

I have removed them and I retesting now and will advise.  Many thanks.

Cheers
0

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