tnef 1.4.12-1.2 (i386 binary) in ubuntu artful

 TNEF is a program for unpacking MIME attachments of type
 "application/ms-tnef". This is typically a Microsoft only attachment.
 .
 The TNEF program allows one to unpack the attachments which were
 encapsulated into the TNEF attachment, thus alleviating the need to use
 Microsoft Outlook to view the attachment.