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Encyclopedia > Transport Neutral Encapsulation Format

Transport Neutral Encapsulation Format or TNEF is a proprietary e-mail attachment format used by Microsoft Outlook and Microsoft Exchange Server. An attached file with TNEF encoding is most usually called winmail.dat or win.dat and has a MIME type of Application/MS-TNEF. Wikipedia does not yet have an article with this exact name. ... Microsoft Outlook or Outlook (full name Microsoft Office Outlook since Outlook 2003) is a personal information manager from Microsoft, and is part of the Microsoft Office suite. ... Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. ... A computer file is a collection of information that is stored in a computer system and can be identified by its full path name. ...

Contents

Overview

Some TNEF files only contain information used by Outlook to generate a richly formatted view of the message, embedded (OLE) documents or Outlook-specific features such as forms, voting buttons, and meeting requests. Other TNEF files may contain files which have been attached to an e-mail message. Object Linking and Embedding (OLE) is a distributed object system and protocol developed by Microsoft. ...


Within the Outlook email client TNEF encoding cannot be explicitly enabled or disabled. Selecting RTF as the format for sending an e-mail implicitly enables TNEF encoding, using it in preference to the more common and widely compatible MIME standard. When sending plain-text or HTML format messages, Outlook uses MIME. An email client (or mail user agent [MUA]) is a computer program that is used to read and send e-mail. ... The Rich Text Format (often abbreviated to RTF) is a proprietary document file format developed and owned by Microsoft since 1987 for cross-platform document interchange. ... Multipurpose Internet Mail Extensions (MIME) is an Internet Standard that extends the format of e-mail to support text in character sets other than US-ASCII, non-text attachments, multi-part message bodies, and header information in non-ASCII character sets. ... Computer files can be divided into two broad categories: binary and text. ... HTML, short for HyperText Markup Language, is the predominant markup language for the creation of web pages. ...


TNEF attachments can contain security sensitive information such as user login name and file paths[1], from which access controls could possibly be inferred. Sensitive information is knowledge that might give someone an advantage if revealed to persons not entitled to know it. ...


Decoding

Programs to decode and extract files from TNEF-encoded attachments are available on many platforms:


Posix

  • yTNEF GPL TNEF extractor from the POSIX command-line, designed specifically for reading winmail.dat.
  • TNEF GPL TNEF extractor from the POSIX command-line.

The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ... POSIX or Portable Operating System Interface[1] is the collective name of a family of related standards specified by the IEEE to define the application programming interface (API) for software compatible with variants of the Unix operating system. ... The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ... POSIX or Portable Operating System Interface[1] is the collective name of a family of related standards specified by the IEEE to define the application programming interface (API) for software compatible with variants of the Unix operating system. ...

Mac

Sherlock 2 for Mac OS 9 with the new metallic appearance Mac OS 9, introduced by Apple Computer on 1999-10-23, is the last version of the Classic Macintosh Operating System (Mac OS) released before being succeeded by Mac OS X. Upon introduction, Mac OS 9 was advertised as... Mac OS X (official IPA pronunciation: ) is a line of proprietary, graphical operating systems developed, marketed, and sold by Apple Inc. ...

MS Windows

  • Winmail.dat Reader Freeware easy-to-use decoder.
  • Winmail Opener Freeware decoder.
  • abcwinmail Freeware decoder.
  • fentun Freeware decoder.

Online

  • tud.at service Web service and GPL licensed PHP script for reading attachments in winmail.dat files.
  • 62ndsOnline winmail.dat attachment extractor.

The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ... PHP (PHP: Hypertext Preprocessor) is a reflective programming language originally designed for producing dynamic Web pages. ...

Others

  • JTNEF GPL Java TNEF package.
  • pytnef library - TNEF access library written in Python, licensed under LGPL.

The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ... Python is a programming language created by Guido van Rossum in 1990. ... GNU logo The GNU Lesser General Public License (formerly the GNU Library General Public License) is a free software license published by the Free Software Foundation. ...

References

  1. ^ How e-mail message formats affect Internet e-mails in Outlook. Microsoft (2005-03-30). Retrieved on 2006-10-13.

Microsoft is one of few companies engaging itself in the console wars Where they are up against sony, nintendo, and of course sharps new console which may cause a threat. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... March 30 is the 89th day of the year in the Gregorian Calendar (90th in a leap year). ... For the Manfred Mann album, see 2006 (album). ... October 13 is the 286th day of the year (287th in leap years) in the Gregorian calendar. ...

External links


  Results from FactBites:
 
Description of Transport Neutral Encapsulation Format (TNEF) in Outlook 2000 (1384 words)
The use of TNEF is commonly affected by settings in Outlook that are referred to as "Microsoft Outlook Rich Text Format." Rich Text Format and TNEF are not exactly the same, but they are closely related.
In either case, the TNEF encoding is sent to the recipient and must be understood by the receiving client to correctly display the encapsulated information.
TNEF cannot be specified on a per message basis in the Corporate or Workgroup installation of Outlook.
Developing a TNEF-Enabled Transport Provider (879 words)
This format encapsulates MAPI properties not supported by an underlying messaging system into a binary stream that can be transferred along with the message when a transport provider sends it.
The TNEF transport provider is responsible for differentiating between these two sets of properties and sending the supported set in the proper manner for the messaging system.
TNEF enabled transports are responsible for choosing a value for this property on outbound messages and encoding it in an appropriate message header (for example, the Message-ID: header for SMTP messages) and in the TNEF stream.
  More results at FactBites »


 

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