.TNEF File Extension
Transport Neutral Encapsulation Format
Developer | Microsoft |
Popularity |
3.7 | 3 Votes |
Category | Misc Files |
Format | N/A |
What is a TNEF file?
File generated by Microsoft Exchange email programs such as Outlook; appears as an email attachment for email clients that don't recognize Microsoft's proprietary TNEF format; may cause the text "application/ms-tnef" to appear in the email if the email client does not recognize Microsoft Exchange formatting.
More Information
NOTE: Transport Neutral Encapsulation Format files with the extension ".tnef" are rare. Instead, unrecognized Exchange messages are usually seen with the filename Winmail.dat (.DAT file).
Programs that open TNEF files
Windows
Mac
Included with OS