Duplicated emails


#1

Hello. I’m having a problem where emails being forwarded out of the DH system are getting duplicated. Here’s the scenario:

someone sends email to jad@lagunatech.com – I have DH set to forward this to my “SpamCop” address outside the DH system.

For some reason, intermittently, some emails get sent to SpamCop twice - resulting in duplicates in my inbox.

DH and SpamCop are pointing fingers at each other, and no one is coming up with a solution. I will append a set of headers below.

First, DH felt that the connection between the DH sender and SpamCop’s receiving server must be dropping during transmission (timeout or other issue) but then we figured out that it was happening within seconds (so not timeout). Next we surmised that for some reason the DH system isn’t receiving the “email received - thanks” ACK from SpamCop.

But nobody solves anything, and I’m becoming a pain in the ass to them since they don’t want to really work to find the solution.

Advice? Thanks/jad

Sample Duplicate Headers

Duplicate 1:

Return-Path: snihguwdgs@rrl.net
Delivered-To: cesmail-net-jad@cesmail.net
Received: (qmail 16640 invoked from network); 7 Aug 2007 04:59:33 -0000
X-Spam-Checker-Version: SpamAssassin 3.2.0 (2007-05-01) on filter8
X-Spam-Level: *****************
X-Spam-Status: hits=17.5 tests=DRUGS_ERECTILE,DRUGS_STOCK_MIMEOLE,DRUG_ED_CAPS,
HS_INDEX_PARAM,HTML_MESSAGE,HTML_MIME_NO_HTML_TAG,MID_DEGREES,MIME_HTML_ONLY,
URIBL_OB_SURBL,URIBL_RHS_DOB,URIBL_SBL version=3.2.0
Received: from unknown (192.168.1.101)
by filter8.cesmail.net with QMQP; 7 Aug 2007 04:59:33 -0000
Received: from looneymail-mx1.g.dreamhost.com (208.113.200.14)
by mailgate.cesmail.net with SMTP; 7 Aug 2007 04:59:33 -0000
Received: by looneymail-mx1.g.dreamhost.com (Postfix)
id 64CF83C61D; Mon, 6 Aug 2007 21:59:33 -0700 (PDT)
Delivered-To: jim--lagunatech.com@looneymail-mx1.g.dreamhost.com
Received: from ADMIN.srziz3jk.com (unknown [58.63.40.80])
by looneymail-mx1.g.dreamhost.com (Postfix) with ESMTP id 09CAC3C61A;
Mon, 6 Aug 2007 21:59:32 -0700 (PDT)
Message-ID: 95191476519730.43375DC91C@H60YZ
From: “Erich Moss” emmubjxdc@rrh.org
To: jad@lagunatech.com
Subject: If a relaxing moment turns into the right moment, will you be ready?
Date: Tue, 7 Aug 2007 12:56:17 +0800
MIME-Version: 1.0
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
Thread-Index: SnSul1M7BQzeAOwjbqBcBkWr2MZe6tGN7z19
Content-Type: text/html;
charset="Windows-1251"
Content-Transfer-Encoding: 7bit
X-SpamCop-Checked:
X-SpamCop-Disposition: Blocked SpamAssassin=17

Duplicate 2:

Return-Path: snihguwdgs@rrl.net
Delivered-To: cesmail-net-jad@cesmail.net
Received: (qmail 30083 invoked from network); 7 Aug 2007 04:59:33 -0000
X-Spam-Checker-Version: SpamAssassin 3.2.0 (2007-05-01) on filter7
X-Spam-Level: *****************
X-Spam-Status: hits=17.5 tests=DRUGS_ERECTILE,DRUGS_STOCK_MIMEOLE,DRUG_ED_CAPS,
HS_INDEX_PARAM,HTML_MESSAGE,HTML_MIME_NO_HTML_TAG,MID_DEGREES,MIME_HTML_ONLY,
URIBL_OB_SURBL,URIBL_RHS_DOB,URIBL_SBL version=3.2.0
Received: from unknown (192.168.1.101)
by filter7.cesmail.net with QMQP; 7 Aug 2007 04:59:33 -0000
Received: from looneymail-mx1.g.dreamhost.com (208.113.200.14)
by mailgate.cesmail.net with SMTP; 7 Aug 2007 04:59:33 -0000
Received: by looneymail-mx1.g.dreamhost.com (Postfix)
id E7E513C61C; Mon, 6 Aug 2007 21:59:32 -0700 (PDT)
Delivered-To: jad--lagunatech.com@looneymail-mx1.g.dreamhost.com
Received: from ADMIN.srziz3jk.com (unknown [58.63.40.80])
by looneymail-mx1.g.dreamhost.com (Postfix) with ESMTP id 09CAC3C61A;
Mon, 6 Aug 2007 21:59:32 -0700 (PDT)
Message-ID: 95191476519730.43375DC91C@H60YZ
From: “Erich Moss” emmubjxdc@rrh.org
To: jad@lagunatech.com
Subject: If a relaxing moment turns into the right moment, will you be ready?
Date: Tue, 7 Aug 2007 12:56:17 +0800
MIME-Version: 1.0
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
Thread-Index: SnSul1M7BQzeAOwjbqBcBkWr2MZe6tGN7z19
Content-Type: text/html;
charset="Windows-1251"
Content-Transfer-Encoding: 7bit
X-SpamCop-Checked:
X-SpamCop-Disposition: Blocked SpamAssassin=17


#2

I would guess that it’s on spamcop’s end, since the forum isn’t flooded with complaints about it. A lot of people forward to GMail and others without problems, but who knows.

Maybe you could set it up to forward to your spamcop account and another account, then if it only dupes for spamcop, ask them how it can be a DH problem instead of theirs.

On the other hand, if it dupes no matter where you send it, then I’d take that info back to DH.


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#3

It’s farily easy to analyze this if you remember that each mail server adds information to the top of the headers. So all you need to do is compare the messages and see where they start to diverge. In this case, I see that one contains:

Delivered-To: jim--lagunatech.com@looneymail-mx1.g.dreamhost.com

and the other:

Delivered-To: jad--lagunatech.com@looneymail-mx1.g.dreamhost.com

The headers below these lines seem to be the same, which means that only one message was sent. There are 2 possibilities: (1) the sender sent copies to both addresses or (2) your DH mail config is set up so that jad@lagunatech.com forwards to both addresses, which in turn forwards to SpamCop.

Larry


#4

Hi - Did you have any update on this?

Just to let you I have the same problem. I set up a fwd from my dh email to a second test email address in addition to my usual fwd to spamcop. I got only 1 copy in the test inbox. So it means DH is faithfully trying to send just 1 email but there’s some interaction with spamcop specifically that causes a dup to be created.

I’ll inform DH support as well unless you have a fix.

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#5

Hi. Thanks for posting to confirm that I’m not the only one with this issue - I have a client set up like we are (forwarding out to SpamCop and same issue for her as well).

I get helpful responses from DH Support, but SpamCop is pretty much ignoring me at this point. Jeff at SpamCop replied a couple of times to point the finger back at DH (suggested their timeouts might be too tight - which DH confirmed were not!).

Now Jeff won’t reply at all when I send him sample headers to diagnose with.

Maybe you can get a response from him - I get the sense he is overworked and his attitude ain’t that great about problems affected limited numbers of users. BUT PLEASE TRY!

There seems to be some problem when SpamCop sends the final ACK back to DH that the email was received. DH doesn’t seem to think the msg went through, so DH resends.

Neither side will own the problem, SpamCop won’t even respond. It kinda sucks.

My direct-email is jad@lagunatech.com if you want to shout at me.

Thanks/jim