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Transport Neutral Encapsulation Format - Just Solve the File Format Problem

Transport Neutral Encapsulation Format

From Just Solve the File Format Problem
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Line 23: Line 23:
 
* http://libxad.cvs.sourceforge.net/viewvc/libxad/testfiles/MS-TNEF/
 
* http://libxad.cvs.sourceforge.net/viewvc/libxad/testfiles/MS-TNEF/
 
* https://github.com/koodaamo/tnefparse/tree/master/tests/examples
 
* https://github.com/koodaamo/tnefparse/tree/master/tests/examples
* https://telparia.com/fileFormatSamples/archive/tnef/
+
* {{DexvertSamples|archive/tnef}}
  
 
== Links and references ==
 
== Links and references ==

Revision as of 21:19, 28 December 2023

File Format
Name Transport Neutral Encapsulation Format
Ontology
Extension(s) .dat, .tnef
MIME Type(s) application/vnd.ms-tnef
Wikidata ID Q1601331

Transport Neutral Encapsulation Format (TNEF) is a proprietary format used by Microsoft mail software to encode attachments and rich text, instead of more standards-compliant methods such as MIME.

It is usually implemented as an attachment called winmail.dat or win.dat, which Microsoft programs know what to do with, but is a useless and confusing attachment to everybody else (unless they use one of several programs and plugins that have been devised to help non-MS-ers cope with it). When saved elsewhere as archives or samples, sometimes the .tnef file extension is used.

Contents

Identification

Such mail files start with signature bytes 0x78 0x9f 0x3e 0x22.

Software

  • Fentun: Freeware Windows program to decode this attachment
  • TNEF: An open source TNEF decoder utility
  • Lookout: Thunderbird addon to read TNEF (based on the above TNEF decoder utility)
  • Winmail Opener
  • ytnef: TNEF command-line extractor

Sample files

Links and references

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox

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