What is the deal with those winmail. dat files? I get them in my email all the time, and nothing seems to be able to open them.

Luckily there are a couple of tools that will let you work with winmail.dat files on your Mac with relative ease.

Many times when receiving mail attachments with the new Exchange-enabled Microsoft Entourage v.X from Windows users, you will get a winmail.dat file that is inaccessible under Mac OS X. Alan Sill ...

I've used TNEF'S Enough, a free utility for the Mac (mentioned last year by Mat) which will crack the files open for you. This week, however, I discovered Letter Opener.

If you regularly receive winmail.dat files from business associates, Letter Opener is well worth the investment.