Need to view a winmail.dat file on your Mac ? Winmail Decoder Is The Best Winmail.dat Viewer for Mac

Winmail Decoder is the easiest, fastest, most reliable way to extract, view, and save the contents of winmail.dat files.

It's completely frustration-free: just double-click the winmail.dat file and you're instantly presented with a list of its contents. Double-click the attached files to open them, or drag and drop them on the desktop. Export files in winmail.dat is easy. and you can even Preview attached files using QuickLook. In most circumstances, you won't even need to leave your Mail program.