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Transport neutral encapsulation format file
File type: Text file
Files with tnef extension are used by Microsoft Outlook Express program. They include some text formatting data.
File type category:
Text file
Date updated: December 20, 2024
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 not meant to be opened manually by the user.
It is not convertable file format.
Software applications that handle other tasks involving tnef files:
Microsoft Windows
Apple macOS / Mac OS X
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