I have a set of winmail.dat files that apparently have evolved from a set of emails with corrupted headers. It looks like Exchange 2010 changed the headers around sometime last September and basically rendered exported .eml files unable to open. Now the HTML/PlainText emails seem to do ok, but the files that use RichText (specifically Microsoft's TNEF format) will not open in any program, Microsoft or not.

I've attempted to use many different non-Microsoft converters and they see it as a corrupted message as well.

If I remove the headers of the email, rename it as a winmail.dat file, some emails will open in Word, but most won't.

If you take a look at the email in a text editor, there are null characters EVERYWHERE that distort the email itself.

Anybody have any experience with this and/or suggestions on how to at least open it?