TNEF File Extension - Open .TNEF files

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Common File Extensions

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.TNEF File Extension

TIP: Run a free scan for .TNEF file extension errors.

File Type

Transport Neutral Encapsulation Format

Popularity

Average

Category

Misc Files

File Description

Contains rich text formatting used in Microsoft Exchange e-mail messages, such as bold, italics, underlining, etc; application/ms-tnef may appear if your e-mail client does not support MS Exchange formatting

Program(s) that open tnef files

Mac OS

Mac OS X Mail

Microsoft Entourage

Windows

Microsoft Outlook or Outlook Express