Winmail.dat

From Noah.org

This shows how to open winmail.dat files under Linux. Microsoft mail clients sometimes wrap attachments in Transport Neutral Encapsulaton Format (TNEF). The `tnef` command can decode these winmail.dat attachments.

First you need to install it. This shows how for Ubuntu:

sudo aptitude install tnef

Then use the `tnef` command to open the archive:

tnef -vf winmail.dat