Transport Neutral Encapsulation Format

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|subcat=E-Mail, newsgroups, and forums
 
|subcat=E-Mail, newsgroups, and forums
 
|mimetypes={{mimetype|application/vnd.ms-tnef}}
 
|mimetypes={{mimetype|application/vnd.ms-tnef}}
|extensions={{ext|dat}}
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|extensions={{ext|dat}}, {{ext|tnef}}
 
}}
 
}}
 
'''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]].
 
'''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).
+
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.
  
 
== Software ==
 
== Software ==
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* [http://sourceforge.net/projects/tnef/ TNEF]: An open source TNEF decoder utility
 
* [http://sourceforge.net/projects/tnef/ TNEF]: An open source TNEF decoder utility
 
* [https://addons.mozilla.org/en-US/thunderbird/addon/lookout/ Lookout]: Thunderbird addon to read TNEF (based on the above TNEF decoder utility)
 
* [https://addons.mozilla.org/en-US/thunderbird/addon/lookout/ Lookout]: Thunderbird addon to read TNEF (based on the above TNEF decoder utility)
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* [http://www.eolsoft.com/download/ Winmail Opener]
  
 
== Sample files ==
 
== Sample files ==
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[[Category:Microsoft]]
 
[[Category:Microsoft]]
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[[Category:File formats with a distinctive filename]]

Revision as of 15:47, 4 May 2016

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

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.

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

Sample files

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