Ancient Version

Careful! This is version 1.0.0 (aka Letter Opener Lite on their homepage), not the current Lion-compatible Letter Opener Pro v 3.0.x which retails at over $29. There are freeware options that have the same functionality as this Lite app. LO Pro looks great, however. Alas this version does not have the invisible interface of the pro version. Not worth the $7 IMHO.

Chess Monger about Winmail Viewer - Letter Opener, v1.0.0