In case you are wondering what this is all about a quick recap might be in order. All versions of Windows (since Windows 95) have a number of hidden and protected files called index.dat, one in ...

DAT files received as email attachments can be opened using specialized apps or services such as Winmail.dat Explorer or the Winmail.dat Viewer website.

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 ...