The TNEF File Viewer Handbook
The TNEF File Viewer is an application for TNEF mail attachments.

Introduction
The TNEF File Viewer allows to handle easily mail attachments using the TNEF format. Those attachments are usually found in mails coming from Microsoft mail servers and embed the mail properties as well as the actual attachments.
An attachment in TNEF format is most often named winmail.dat or win.dat.
TNEF Main Window
TNEF Main Window
This utility program allows to perform various operations on those attachments:
View/open attachments with associated applications.
Extract actual attachments
View message properties (TNEF/MAPI)
View/extract message formatted text (in RTF format)
automatically shows the content of a TNEF attachment. You can open or save the attachments using the actions in the context menu.
TNEF attachment in
TNEF attachment in

Credits and License
TNEF File Viewer (KTnef)
Program copyright 2000 kde-print@kde.org.
Program copyright 2012 Allen Winter winter@kde.org.