how to open .dat file extension

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Oldwest

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Cannot open win.dat file extension. New to Windows 7, using Thunderbird email. Can anyone help?
 

DoubleHelix

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In my experience, a DAT file attached to an e-mail rarely contains anything. It contains meta/header/message data. If you're actually expecting an attachment, ask the sender what they're trying to send and how they're sending it.
 

Oldwest

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I have received three forwarded text messages from one friend, all are winmail.dat. He doesn't know the origin but he could open all of them.
Thanks for your interest.
Oldwest
 

TerryNet

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Did you try opening one with Notepad as that article suggests?
 

calvin-c

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Personally I'd have trouble trusting an attachment if the sender doesn't know where it came from-unless I really trusted the sender to have thoroughly checked out the attachment to ensure it's harmless.

OTOH if the sender was able to open it then the attachment is, more than likely, really a winmail.dat file & is therefore harmless. An article specifically addressing winmail.dat attachments is at http://www.pchell.com/support/winmaildat.shtml

According to that the attachment contains formatting, text styles, etc. for use by Outlook. IOW, nothing meaningful for T-Bird.
 
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