Exchange 2010 sends attachments as winmail.dat

Question

Hi
Some users are complaining about pdf attachements they received as winmail.dat. This is an internally isue.
For external mail flow I disabled tnef conversion, seems to work. Is there a possibility to do the same thing for the internal mail flow?
Regards
Peter

Answer 1

Hi PeterN22,
Winmail.dat attachments are included in received e-mail messages is because the Winmail.dat file is used to preserve formatting that the sending
client includes in the message, but the receiving client does not recognize the Winmail.dat file.(The original message attachment is not always separate from the Winmail.dat file attachment, and may be included in the Winmail.dat file attachment.)
So it is important to clarify what clients were involved in both the sending and receiving the messages in question.
If this is occur in Outlook, here is a related document for you:
Winmail.dat attachments are included in received e-mail messages in Outlook
http://support.microsoft.com/kb/278061
Thanks,
Evan
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