.TNEF File

The tnef file extension is associated with Microsoft Outlook Express, an e-mail and news client included in earlier releases of Microsoft Internet Explorer. The latest edition of Outlook Express is called Microsoft Mail Live.

The .tnef files contains rich text formatting used in Microsoft Exchange e-mail messages, such as bold, italics, underlining, etc..

Mime type: application/ms-tnef

Files with tnef extension are used by Microsoft Outlook Express program. They include some text formatting data.

How to open:

Files with tnef extension are not meant to be opened manually by the user.

How to convert:

It is not convertable file format.