Outlook and UUENCODED attachments

[James A. Pattie]

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I'm not 100% sure that this is a MailScanner issue but this issue only
started being reported after installing MailScanner.

I have a user that is sending file attachments (usually office
documents) from Outlook 97 and when they send these e-mails to other
internal users the other users get the e-mail but the attachment is
empty.  When they send the e-mail to me (external using Mozilla mail) I
get the e-mail fine.

It appears that the originating mail client is encoding using UUENCODE
instead of MIME from the following headers:

X-Mailer: Microsoft Internet E-mail/MAPI - 8.0.0.4211
Encoding: 15 TEXT, 447 UUENCODE
X-MS-Attachment: Doc1.doc 0 00-00-1980 00:00

MailScanner is generating the following body content:

The following is a multipart MIME message which was extracted
from a uuencoded message.

- ------------=_1047489992-23715-0

The message then follows the boundary and goes on.

The internal users, also using Outlook 97, are getting the message and
when they forward it to me the file attachment looks like this:

- ------ =_NextPart_000_01C2E88B.02DAFF40
Content-Type: application/msword; name="Doc1.doc"
Content-Transfer-Encoding: base64


- ------ =_NextPart_000_01C2E88B.02DAFF40--

When the user sends me the same attachment, I get the following:

- ------------=_1047489992-23715-0
Content-Type: application/octet-stream; name="Doc1.doc"; x-unix-mode="0600"
Content-Disposition: inline; filename="Doc1.doc"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-Mailer: MIME-tools 5.411 (Entity 5.404)

<File base64 encoded here>

- ------------=_1047489992-23715-0--


The originating site is using MailScanner 4.12-2 and I'm using
MailScanner 4.13-3.


If needed I can send the sanitised e-mails for inspection.

- --
James A. Pattie
james at pcxperience.com

Linux  --  SysAdmin / Programmer
Xperience, Inc.
http://www.pcxperience.com/
http://www.xperienceinc.com/

GPG Key Available at http://www.pcxperience.com/gpgkeys/james.html
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--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.