.TNEF File Overview

File Extension:	TNEF
File Type Description:	Transport Neutral Encapsulation Format
File Type Developer:	Microsoft Corporation
Primary Associated Software:	Microsoft Outlook Express
Primary Software Developer:	Microsoft Corporation

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TNEF

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Home File Types Uncommon Files TNEF

What is File Extension TNEF?

Microsoft Corporation developed the Transport Neutral Encapsulation Format file type when the Microsoft Outlook was initially released. According to our internal data, Transport Neutral Encapsulation Format files are most popular with users in United States, with a majority of them running Windows 10. In most cases, these users are surfing the internet using the Google Chrome browser.

Associated Developers and Software

	Microsoft Outlook by Microsoft Corporation
	Microsoft Outlook Express by Microsoft Corporation
	Apple Mail by Apple

Top TNEF User Languages

Top TNEF File User Browsers

Desktop Friendly?

Mobile Friendly?

Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	Mac
	iOS

Other File Types Related to TNEF Files

Extension	File Type Developer	File Category	File Type Description
.PRT	PTC	CAD Files	Pro/ENGINEER Part File
.RTC	Brain Innovation	Data Files	BrainVoyager QX Design Matrix File
.XLTM	Microsoft Corporation	Spreadsheet Files	Excel Open XML Macro-Enabled Spreadsheet Template
.PHTM	The Catalina Group	Web Files	PHP-Based Web Page
.VBP	Microsoft Corporation	Developer Files	Visual Basic Project File
.SRE	Microsoft Corporation	Data Files	Windows CE 5.0 File
.MBF	Microsoft Corporation	Backup Files	Microsoft Money Backup File
.MAI	Microsoft Corporation	Data Files	Microsoft Mail File
.BKW	Microsoft Corporation	Graphic Files	FontEdit Image File
.LACCDB	Microsoft Corporation	Page Layout Files	Microsoft Access Lock File