KTnef is a TNEf file viewer/extractor for KDE. It scans TNEF file for attachments, and shows the result in an archiver-like interface, allowing you to view or extract those attachments easily. It integrates completely into the KDE environment for file viewing, using the MIME types encoded in the TNEF file. It can also bee registered as an opening application for e-mail clients, like Netscape.