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Preventing Winmail.dat Files Attached to Email

Posted on 2014-03-25
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Last Modified: 2014-04-10
I have a end user that when sending attachments via Outlook the attachment is converted to a winmail.dat file. The receiving end is not able to open.  Anyone know how to fix this?
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Question by:Goraps
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David Atkin earned 500 total points
ID: 39953886
Hello,

Try this on the client machine:

http://support.microsoft.com/kb/958012
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by:l33tf0b
ID: 39954498
You can also perform the steps described here depending on how you want to fix:

http://support.microsoft.com/kb/290809


TNEF is MAPI based which is what Microsoft uses.  Not all clients are able to read the attachments when composed using RTF so it's advised to use Plain Text / HTML when sending to clients not using Outlook.
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