Home : File Types : MS-TNEF File

.MS-TNEF File Extension

File TypeMS Transport Neutral Encapsulation Format

2.7 (3 Votes)
CategoryMisc Files

What is an MS-TNEF file?

File sometimes generated by Microsoft email programs such as Outlook; saves the message in Microsoft's proprietary TNEF format, which often is not recognized by other email programs; may cause the email to appear with the "application/ms-tnef" text, which is the MIME type for Microsoft Exchange email formatting.

More Information

NOTE: MS-TNEF files are rarely seen with the ".ms-tnef" extension. Instead, they are usually seen with the filename Winmail.dat (.DAT file), which includes the MS-TNEF encoded data.

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Programs that open MS-TNEF files

Updated 7/8/2011

About MS-TNEF Files

Our goal is to help you understand what a file with a *.ms-tnef suffix is and how to open it.

The MS Transport Neutral Encapsulation Format file type, file format description, and Mac and Windows programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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