Tool to unpack MIME application/ms-tnef attachments

 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.