Cisdem WinmailReader for Mac - 2.0.0: Cisdem WinmailReader for Mac can open winmail.dat files and preview or save the attachment. You can double-click to check the message and the attachment, or drag-and-drop to open multiple files, or use it as QuickLook to preview the attachment.

What is the deal with those winmail.dat files? I get them in my email all the time, and nothing seems to be able to open them.
Winmail.dat is a proprietary email file format generated by Outlook or a Microsoft Exchange Server that provides rich-text formatting (like bold, italics, color, and more). The problem is that the files can only be read by certain email clients.

Winmail

There are two ways to solve this problem. If you know the sender well, you can ask the sender to stop sending them. To disable this file format in Outlook on Windows, navigate to Options > Tools > Mail Format. From the Send In This Message Format list, select either Plain Text or HTML, then click OK to save the new setting.

With the $0.99 Winmail File Viewer app for the iPhone, you can view your Winmail.dat files while on the go.

If you can’t convince the sender to use standard email formats, you also have a few options for reading these Winmail.dat-formatted messages. On the Mac, TNEF’s Enough, can open winmail.dat files. If you are on an iOS device, try Winmail File Viewer.

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GOT A TECH QUESTION OR A HELPFUL TIP TO SHARE?

Winmail

Email ask@maclife.com or write to Mac|Life,
4000 Shoreline Ct, Suite 400, South San Francisco, CA 94080

(Redirected from Winmail.dat)

Transport Neutral Encapsulation Format or TNEF is a proprietary email attachment format used by Microsoft Outlook and Microsoft Exchange Server. An attached file with TNEF encoding is most often named winmail.dat or win.dat, and has a MIME type of Application/MS-TNEF.The official (IANA) media type, however, is application/vnd.ms-tnef.[1]

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  • 3Decoding

Overview[edit]

Some TNEF files contain information used by only Outlook to generate a richly formatted view of the message, such as 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.

Within the Outlook e-mail client, TNEF encoding cannot be explicitly enabled or disabled (except via a registry setting[2]). 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, some versions of Outlook (apparently including Outlook 2000[3]) prefer MIME, but may still use TNEF under some circumstances (for example, if an Outlook feature requires it).[3][4]

TNEF attachments can contain security-sensitive information such as user login name and file paths,[3][4] from which access controls could possibly be inferred.

Exchange Server[edit]

Native-mode Microsoft Exchange 2000 organizations will, in some circumstances, send entire messages as TNEF-encoded raw binary independent of what is advertised by the receiving SMTP server. As documented in Microsoft KBA #323483,[5] this technique is not RFC-compliant because these messages have the following characteristics:

  • They may include non-ASCII characters outside the 0–127 US-ASCII range.
  • The lines in these messages are often too long for transport via SMTP.
  • They do not follow the CRLF.CRLF message termination semantics as specified in RFC 821.

Internal communications between Exchange Servers (2000 and later) over SMTP encode the message in S/TNEF (Summary TNEF) format. The conversion between the format needed by the end client on the Internet is performed on the last Hub Transport server before final delivery, and when the Hub Transport role of an Exchange Server is about to deliver the message to a mailbox role server, the message is converted to MAPI format for storage. Good ebook reader for mac.

S/TNEF differs from TNEF in that it is 8-bit (not 7-bit for TNEF) and does not contain a plain-text portion.

Winmail Dat Reader For Mac

Decoding[edit]

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

Multiplatform[edit]

  • Geary (email client) supports TNEF since version 3.33.1
  • TNEF Parse – Claws Mail plugin[6]
  • LookOut[7] or its successor LookOut (fix version)[8] – Mozilla Thunderbird extension. See also:
    • LookOut project page at MozDev.org[9]
    • Bug 77811 – Inline viewer for Microsoft proprietary mail formats, a 15-plus-year-old bug report at the Mozilla Bugzilla[10]
  • Wireshark – Version 1.2 and later can open and dissect winmail.dat files, although it is not useful as a mail reader

Winmail.dat Reader For Mac Free

Unix-like or POSIX command-line[edit]

  • yTNEF – GPL TNEF extractor from the POSIX command-line, designed specifically for reading winmail.dat[11]
  • TNEF – GPL TNEF extractor from the POSIX command-line[12]
  • KTNEF – GPL TNEF extractor for KDE[13]

Mac[edit]

  • Klammer – Shareware for Mac OS X, available on App store; also supports MSG files[14]
  • MailRaider Pro - Application for Mac OS X, available on App store; also supports MSG files[15]
  • Winmail Viewer – Shareware Winmail.dat viewer for Mac OS X 10.6 or later, available on App Store, support open Microsoft Outlook (1997, 2000, 2003, 2007, 2010). Winmail.dat files, can extract and save Winmail.dat attachments[16]
  • TNEF's Enough – Freeware decoder for Mac OS 9 and Mac OS X[17]
  • tnefDD – Free GPL decoder with drag-and-drop functionality for Mac OS X[18]
  • TNEF MacPorts version of the TNEF command-line decoder Mac OS X[19]
  • Letter Opener (previously known as OMiC) – Shareware, plugin for Apple Mail[20]

iPhone and iPad[edit]

  • Winmail File Viewer – Paid universal app for the iPhone, iPod Touch and iPad to open winmail.dat attachments with option to save and share extracted files[21]
  • WinMail.dat Viewer - Browse Outlook winmail.dat files – Paid universal app for the iPhone, iPod Touch and iPad to open winmail.dat attachments with option to view, save and share extracted files[22]
  • Winmail File Viewer+ – Paid universal app for the iPhone, iPod Touch and iPad to open winmail.dat attachments with option to save and share extracted files[23]
  • Klammer - open EML, MSG and Winmail.dat files – Paid universal app for the iPhone, iPod Touch and iPad with in-app purchase to provide functionality[24]
  • WinDat Opener – Paid app for the iPhone, iPod Touch and iPad[25]
  • Letter Opener – Free Universal app for the iPhone, iPod Touch and iPad with in-app purchase to provide functionality[26]

Iphone Winmail Dat Attachments

Microsoft Windows[edit]

  • Winmail.dat Reader – Freeware easy-to-use decoder[27]
  • Winmail Opener – Freeware decoder[28]
  • tnef2win – Freeware decoder[29]
  • Free File Viewer – Freeware decoder[30]
  • fentun – Freeware decoder[31]
  • Winmail.dat Viewer – modern Windows 8 app (non-free)[32]

Download Winmail

Android[edit]

How To Open A Winmail Dat File

  • Opener – A free Android app[33]
  • Reader - Free Android app also available[27]

Online[edit]

  • winmail.dat extractor and document converter – Free, in modern, responsive theme[34]
  • Reader Online – The online version of the Winmail.dat Reader (free)[35]
  • tud.at service – Web service and GPL licensed PHP script for reading attachments in winmail.dat files[36]
  • www.winmaildat.com – Another online winmail.dat extractor which allows to upload up to 5 MB[37]
  • the-computer-site.com – converts winmail.dat file to a zip file[38]

Software libraries[edit]

  • JTNEF – GPL Java TNEF package[39]
  • POI-HMEF – Java library of the Apache POI project[40]
  • MVCOM – Commercial COM component to parse TNEF[41]
  • Convert::TNEF – TNEF library written in Perl[42]
  • tnefparse library – TNEF access library written in Python, licensed under LGPL[43]
  • Aspose Email – Commercial Java and .NET library that can parse and extract TNEF data[44]
  • EAGetMail Component – Commercial .NET and ActiveX library that can parse and extract TNEF data[45]
  • node-tnef - NodeJS command line tool/library that can parse and extract TNEF data[46]
  • libytnef – GPL TNEF extractor library written in C[47]


Open Winmail Dat File Mac

References[edit]

  1. ^'Some Microsoft Media Types for registration'. IANA. Retrieved October 25, 2010.Cite web requires |website= (help)
  2. ^'When you use Outlook 2007 to send an e-mail message, the recipient of the message sees an attachment that is called Winmail.dat'. Microsoft. July 29, 2009. Retrieved March 3, 2011.Cite web requires |website= (help)
  3. ^ abc'Description of Transport Neutral Encapsulation Format (TNEF) in Outlook 2000'. Microsoft. Retrieved September 11, 2009.Cite web requires |website= (help)
  4. ^ ab'How e-mail message formats affect Internet e-mails in Outlook'. Microsoft. March 30, 2005. Retrieved October 13, 2006.Cite web requires |website= (help)
  5. ^Microsoft KBA #323483
  6. ^'Claws Mail - Plugins'. www.Claws-Mail.org. Retrieved December 23, 2017.
  7. ^'LookOut'. addons.Mozilla.org. Retrieved December 23, 2017.
  8. ^'LookOut (fix version)'. addons.Mozilla.org. Retrieved December 23, 2017.
  9. ^'mozdev.org - lookout: index'. lookout.MozDev.org. Retrieved December 23, 2017.
  10. ^'77811 - Inline viewer for Microsoft proprietary mail formats (ms-tnef, etc.) ['winmail.dat']'. bugzilla.Mozilla.org. Retrieved December 23, 2017.
  11. ^Yeraze (November 21, 2017). 'ytnef: Yeraze's TNEF Stream Reader - for winmail.dat files'. Retrieved December 23, 2017 – via GitHub.Cite web requires |website= (help)
  12. ^Simpson, Mark (December 8, 2017). 'tnef'. Retrieved December 23, 2017 – via GitHub.Cite web requires |website= (help)
  13. ^'KTnef'. SourceForge. Retrieved December 23, 2017.
  14. ^'Klammer on the Mac App Store'. Mac App Store. Retrieved December 23, 2017.
  15. ^'MailRaider Pro on the Mac App Store'. Mac App Store. Retrieved December 23, 2017.
  16. ^'Winmail Viewer - Open and Read Winmail.dat Files on the Mac App Store'. Mac App Store. Retrieved December 23, 2017.
  17. ^'Josh Jacob - TNEF's Enough'. www.JoshJacob.com. Retrieved December 23, 2017.
  18. ^'tnefDD'. SourceForge.net. Retrieved December 23, 2017.
  19. ^(mij@macports.org), Jim Mock. 'The MacPorts Project -- Available Ports'. www.MacPorts.org. Retrieved December 23, 2017.
  20. ^'Letter Opener'. Restoroot.org. Archived from the original on November 2, 2006. Retrieved December 23, 2017.Cite uses deprecated parameter |deadurl= (help)
  21. ^'Winmail File Viewer on the App Store'. App Store. Retrieved January 8, 2018.
  22. ^'WinMail.dat Viewer for OS 10 on the App Store'. App Store. Retrieved January 8, 2018.
  23. ^'Winmail Viewer for iPhone and iPad on the App Store'. App Store. Retrieved January 8, 2018.
  24. ^'Klammer on the App Store'. App Store. Retrieved January 8, 2018.
  25. ^'WinDat Opener on the App Store'. App Store. Retrieved January 8, 2018.
  26. ^'Connecting to the iTunes Store'. iTunes.apple.com. Retrieved January 8, 2018.
  27. ^ ab'Winmail.dat Reader - Open winmail.dat files (Freeware)'. www.Winmail-dat.com. Retrieved December 23, 2017.
  28. ^'Winmail Opener - freeware utility for opening winmail.dat and other TNEF-encoded files'. www.Eolsoft.com. Retrieved December 23, 2017.
  29. ^Petersen, Frank. 'tnef(TO)win, convert mstnef-attachments'. www.Petersen.de. Retrieved December 23, 2017.
  30. ^'PDF, DOC, DOCX, DAT, BIN, PHP Viewer - FreeFileViewer'. www.FreeFileViewer.com. Retrieved December 23, 2017.
  31. ^'Welcome to Fentun's Home Page'. www.Fentun.com. Retrieved December 23, 2017.
  32. ^'Get Winmail.dat Viewer - Letter Opener - Microsoft Store'. Microsoft Store. Retrieved December 23, 2017.
  33. ^'Winmail.dat Opener'. Google.com. Retrieved December 23, 2017.
  34. ^grapph.com, Milos Wikarski. 'Free Online Document Converter'. doc2any.Grapph.com. Retrieved December 23, 2017.
  35. ^'Online version - Winmail.dat Reader'. www.Winmail-dat.com. Retrieved December 23, 2017.
  36. ^'MS-TNEF degenerator'. tud.at. Retrieved December 23, 2017.
  37. ^'www.winmaildat.com'. Winmaildat.com. Retrieved December 23, 2017.
  38. ^'the-computer-site.com - The Computer Site - Extract Attachments from WINMAIL.DAT files'. The-Computer-Site.com. Retrieved December 23, 2017.
  39. ^'JTNEF - Java TNEF package'. www.FreeUtils.net. Retrieved January 8, 2018.
  40. ^'POI-HMEF - Java API To Access Microsoft Transport Neutral Encoding Files (TNEF)'. poi.Apache.org. Retrieved January 8, 2018.
  41. ^'MVCOM - MAPI-Free COM component for Outlook .pst, .msg, .ost'. www.Encryptomatic.com. Retrieved January 8, 2018.
  42. ^'Convert::TNEF - Perl module to read TNEF files - metacpan.org'. Metacpan.org. Retrieved January 8, 2018.
  43. ^'tnefparse: a TNEF decoding library written in python, without external dependencies'. October 18, 2017. Retrieved January 8, 2018 – via GitHub.Cite web requires |website= (help)
  44. ^Sheikh, Farrukh. 'Outlook Alternative - Email APIs for .NET Java Android SharePoint Cloud'. www.Aspose.com. Retrieved January 8, 2018.
  45. ^'IMAP4 Component, POP3 Component, Email Parser for C#, VB, C++, Delphi - Retrieve Email, Parse Email, Decrypt Email, S/MIME, Parse winmail.dat, TNEF, Parse Outlook Msg, SSL, TLS'. www.EmailArchitect.net. Retrieved January 8, 2018.
  46. ^Murphy, John. 'node-tnef'. Retrieved August 31, 2018.Cite web requires |website= (help)
  47. ^Yeraze (November 21, 2017). 'ytnef: Yeraze's TNEF Stream Reader - for winmail.dat files'. Retrieved December 23, 2017 – via GitHub.Cite web requires |website= (help)

External links[edit]

  • Specification:
    • 'M-OXTNEF: Transport Neutral Encapsulation Format (TNEF) Data Algorithm' - MS-TNEF format specifications
  • Microsoft Support:
    • 'How e-mail message formats affect Internet e-mails in Outlook' - How to disable TNEF in Outlook 2002 and 2003
    • 'Description of Transport Neutral Encapsulation Format (TNEF) in Outlook 2000' - How to disable TNEF in Outlook 2000
    • 'How to configure Internet e-mail message formats at the user and the domain levels in Exchange Server 2003' - Includes instructions on disabling TNEF
  • Other:

Winmail Dat Reader For Mac Os X Download

Retrieved from 'https://en.wikipedia.org/w/index.php?title=Transport_Neutral_Encapsulation_Format&oldid=905371202'

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