The user-friendly, lightweight, and fast email client Latest Release: 3.18.0 / 4.0.0 (News), on 10 July 2021

The TNEF Parser plugin

The TNEF Parser plugins handles TNEF attachments from Outlook. TNEF attachments have a MIME type of "application/ms-tnef" and are often named "winmail.dat". They can contain multiple files. This plugin parses this kind of attachment and displays the real files in the parts list.
Here are a few screenshots illustrating the features: