I have user who is continually receiving a 10MB email from a genuine
business contact who uses Gmail.

All I can do at present is add the Gmail address to our spam
blacklist. However the email continues to be sent from the Gmail
account but now it is rejected. The user will need to communicate with
the gmail acocunt holder in the future so this isn't a pratical
solution.

My question is who do I contact at gmail to "terminate" this mail?

Many Thanks

Matthew Key

How long has this been going on for? Can you capture a few examples of
the mail with full headers to see exactly where the mail is being
duplicated?

Thanks for the reply Joshua,
two days now, It appears to be being recent every 7 minutes:
here is the header, minus some detail,

Microsoft Mail Internet Headers Version 2.0
Received: from hostedexchange.hostedservice.com ([xxxxxxxxxxx]) by
THHS2EXBE3X.hostedservice2.net with Microsoft SMTPSVC(6.0.3790.1830);
         Mon, 6 Oct 2008 09:47:27 +0100

Received: from mail150.messagelabs.com ([85.158.136.115]) by
hostedexchange.hostedservice.com with Microsoft
SMTPSVC(6.0.3790.1830);
         Mon, 6 Oct 2008 09:47:18 +0100

X-VirusChecked: Checked

X-Env-Sender:    [email address]

X-Msg-Ref: server-8.tower-150.messagelabs.com!1223282826!9107555!1

X-StarScan-Version: 5.5.12.14.2; banners=-,-,-

X-Originating-IP: [209.85.134.187]

X-SpamReason: No, hits=0.0 required=7.0 tests=Mail larger than max
spam
  size

Received: (qmail 14407 invoked from network); 6 Oct 2008 08:47:06
-0000

Received: from mu-out-0910.google.com (HELO mu-out-0910.google.com)
(209.85.134.187)
  by server-8.tower-150.messagelabs.com with SMTP; 6 Oct 2008 08:47:06
-0000

Received: by mu-out-0910.google.com with SMTP id w9so2472630mue.0
        for <[email address]>; Mon, 06 Oct 2008 01:47:06 -0700
(PDT)

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:received:received:message-id:reply-
to:from:to
         :subject:date:mime-version:content-type:x-priority:x-msmail-
priority
         :x-mailer:x-mimeole;

DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=message-id:reply-to:from:to:subject:date:mime-
version:content-type
         :x-priority:x-msmail-priority:x-mailer:x-mimeole;

Received: by 10.102.234.20 with SMTP id g20mr2579734muh.
113.1223282824585;
        Mon, 06 Oct 2008 01:47:04 -0700 (PDT)

Return-Path: <[email address]>

Received: from xxxxxxx ([XXXXXXXXXXXX])
        by mx.google.com with ESMTPS id j9sm14451889mue.
3.2008.10.06.01.45.59
        (version=SSLv3 cipher=RC4-MD5);
        Mon, 06 Oct 2008 01:46:49 -0700 (PDT)

Message-ID: <003801c9278f$f58bb470$0501a8c0@xxxxxxx>

Reply-To: <xxxxxxxxxxxxxxxxxxxxxx>

From:   <[email address]>
To:  <[email address]>
Subject: xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Date: Mon, 6 Oct 2008 11:23:42 +0300
MIME-Version: 1.0
Content-Type: multipart/mixed;

On Oct 7, 2:17 pm, JoshuaDPS wrote:

Let's take a look at the times here:

On Oct 7, 11:28 am, matthewselkirk wrote:

The only break in time is between the time given by the originating
email client (Outlook? You deleted too many details to be sure) and
the time of reception at google's SMTP server. This appears to show
that it is the originating client that is continually resending the
same message. Can you contact the sender and see if the message is
stuck in their outlook outbox or their outgoing virus checking
software? Can you ask them to just turn off their computer and see if
the sending stops?