tiff causing DOS message

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Hello

We have a customer that is attempting to send a tif file that is a little
over 3.5 mb, when trying to send he receives the following error:

The following e-mails were found to have: Virus Detected

    Sender: xxxxxx at pris.bc.ca
IP Address: 64.114.126.175
 Recipient: xxxxxx at peacecountry.com
   Subject: '...are' sticker
 MessageID: i94Kea0D007039
    Report: Denial of Service attack in message!
            Denial of Service attack in message!


The interesting part of the df file is:

--============_-1115191450==_============
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

hello doris & frances,

please find the attached layout of the sticker that you requested.


thanks!

jesh 250-782-6068
--============_-1115191450==_============
Content-Id: <a05200f00bd87873eaf3f@[192.168.0.102].0.0>
Content-Type: image/tiff; name="are.tif"
 ; x-mac-type="54494646"
 ; x-mac-creator="3842494D"
Content-Disposition: attachment; filename="are.tif"
Content-Transfer-Encoding: base64


I have looked as best I can but cannot find a reason for this, we are
running MS-4.33.3 with ClamAV-0.80rc2

any pointers would be appreciated.

Rick

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