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

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

I was confused by your answer regarding winmail.dat. The file cannot be opened traditionally, at least to obtain what the receiver believes to be valuable contents. Rather, it's used internally by ...

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 ...

Letter Opener isn't cheap, and the utility vs. cost ratio is dependent on how many winmail.dat files you deal with on a daily basis. Prices range from $29.95US for a single license, to $179.95US ...

Is anyone else receiving winmail.dat attachments, instead of the real attachment since migrating to Exchange 2010? I've had MS give me 4 different kb's on it and none have resolve the issue thus ...

Seeing winmail.dat attachments in your email messages? It’s not your fault.

OK we have a client that we moved to exchange and now one user has winmail.dat attachments on anything she sends that has an attachment. It seems as if some people only get the winmail.dat ...

When Outlook sends an e-mail in the Rich Text format, it includes the underlying text commands in an attached Winmail.dat file. But Outlook also puts the PDF attachment inside the Winmail.dat file ...