RE: Missing attachments with evidence of MS-TNEF and winmail.dat

Hi,

Thank you for posing here.

From your post, I understand that you receive email that the attachment
will be changed to winmail.dat file from one external sender.
I understand when one client sends it to external users in Outlook 2003. Is
this correct?

Based on my research, the issue is most likely caused by TNEF that Outlook
uses to package information for sending messages across the Internet when
using Rich Text format. When an e-mail client (recipient) that does not
understand TNEF receives a message that contains TNEF information, he may
receive a winmail.dat
attachment.

For more information, please refer to the following article.

290809 How e-mail message formats affect Internet e-mails in Outlook
http://support.microsoft.com/default.aspx?scid=kb;EN-US;290809

Generally speaking, we can resolve the issue by using HTML format. At this
time, I would suggest that we use HTML message to check the effect.

1. Start Outlook and choose Tools -> Options.
2. In the Mail Format Tab, choose HTML beside the option "Compose in this
message format"
3. Please send a message with attachments to check the effect.

Hope this helps. If there is any update, please feel free to get in touch!


Best Regards,

Chace Zhang (MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

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--------------------
| Date: Wed, 15 Nov 2006 19:08:44 -0500
| From: Jim Helfer <JimHelfer@xxxxxxxxxxxxxxxx>
| User-Agent: Mozilla Thunderbird 0.7.1 (Windows/20040626)
| X-Accept-Language: en-us, en
| MIME-Version: 1.0
| Subject: Missing attachments with evidence of MS-TNEF and winmail.dat
| Content-Type: text/plain; charset=us-ascii; format=flowed
| Content-Transfer-Encoding: 7bit
| Message-ID: <#LPhiNRCHHA.4292@xxxxxxxxxxxxxxxxxxxx>
| Newsgroups: microsoft.public.exchange.clients
| NNTP-Posting-Host: wtwarch.com 66.212.142.243
| Lines: 1
| Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP06.phx.gbl
| Xref: TK2MSFTNGXA01.phx.gbl microsoft.public.exchange.clients:97675
| X-Tomcat-NG: microsoft.public.exchange.clients
|
|
| One of my users is complaining that they are not recieving attachments
| from a particular person from another office. The messages come through
| fine, but there is no sign of the attachments (and no sign that they
| were stripped by a firewall or AV sentry).
|
| When I looked at the itnernet headers of the subject emails I noticed
| some things that made me suspicious, such as winmail.dat and ms-tnef in
| describing an attachment in the body. (I'm sorry, I don't have the
| exact header with me at the momert).
|
| I remembered an old problem with Oulook that was related to using
| rich-tecxt formatting, and found a kb that mentioned that this was still
| an ongoing problem. I forwarded the information to the user, but I am
| not sure if they are intneding on acting on it.
|
| My question is, what actually happened to the attachment? Is it
| still there? If so, how can I recover it?
|
| If the sender is unwilling to change their settings (strange, but a
| possibility in this case) is there anything else I can do to on my end?
|
| Thanks
| Jim
|

.