Attachment over 4MB removed and body of email full of characters

[proudusa]

Does anyone know what might cause an e-mail attachment to be removed and the body of the e-mail to be filled with random characters.

When e-mail is received it shows attachment and size (i.e. 6MB).
when you open email nothing it will display routing info plus this information:

Content-Type: multipart/mixed;
boundary=--boundary_3_902a8037-f3e2-4cab-8131-3787e829b46c

----boundary_3_902a8037-f3e2-4cab-8131-3787e829b46c
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64
but characters and it will say the type of content

then random characters followed by this information that shows type of attachment it's supposed to be:

----boundary_3_902a8037-f3e2-4cab-8131-3787e829b46c
Content-Type: application/octet-stream;
name="OrderUploads/02-12-2008-37-81-1-B&W SI logo.eps"
Content-Transfer-Encoding: base64

then characters again.

Exchange 2003 SP2 no size limit
Watchguard x10e not stripping attachments
Panda AV not stripping attachments

Thanks

 

[xmsre]

Something stripped a required mime 1.0 header or never put it there in the first place. Some versions of groupwise do that. Applemail does a pretty good job of garbling messages as well.

 

[proudusa]

One was sent via webmail from ATT. would that apply in this case also?

thanks

 

[xmsre]

post the headers.

 

[proudusa]

Microsoft Mail Internet Headers Version 2.0
Received: from DOMAIN.COM ([INTERNAL IP ADDRESS]) by mail.domain.com with Microsoft SMTPSVC(6.0.3790.1830);
Thu, 4 Dec 2008 15:19:54 -0500
From: postmaster@domain.com
Bcc:
Return-Path: postmaster@domain.com
Message-ID: <SERVERNAMEfExvWvqzAoa2J00000039@mail.domain.com>
X-OriginalArrivalTime: 04 Dec 2008 20:20:49.0687 (UTC) FILETIME=[CC4D7A70:01C9564D]
Date: 4 Dec 2008 15:20:49 -0500

 

[xmsre]

I don't see anything bizzare in the little bit of the path you're showing; it's coming from Exchange 2000...

Are you, or they, by any chance using disclaimer software like Exclaimer?