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	Description of Transport Neutral Encapsulation Format (TNEF) in Outlook 2000
		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.
	support.microsoft.com /kb/241538 (1384 words)

	Developing a TNEF-Enabled Transport Provider
		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.
	msdn2.microsoft.com /en-us/library/ms531504.aspx (879 words)

	Developing a TNEF-Enabled Transport Provider
		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.
	msdn.microsoft.com /library/en-us/mapi/html/f1cc6408-2863-4072-a3cb-ff5128c8124b.asp?frame=true (752 words)

	OL2000: Transport Neutral Encapsulation Format (TNEF) Basics
		Transport Neutral Encapsulation Format (TNEF) is a Microsoft proprietary method for encoding Rich Text Format (RTF) messages sent across the Internet.
		When a message containing TNEF information is received by a mail client that does not understand TNEF, an attachment is created with the name Winmail.dat.
		There are servers that can be configured to look for TNEF and winmail.dat and strip it out, but the usual symptom in that case is that the servers completely remove the Winmail.dat attachment.
	support.microsoft.com /kb/224817 (592 words)

	tnef(1): - Linux man page
		Mutt can't use tnef for its intended purpose until an appropriate content type definition exists in ~/.mailcap.
		The latter command string invokes tnef, specifying both the -w option and the attachment (created as a temporary file) as command line arguments.
		Move the cursor over the TNEF attachment and press the enter key to "view" the attachment.
	www.die.net /doc/linux/man/man1/tnef.1.html (368 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		tnef decodes e-mail attachments encoded in Microsoft's Transport Neutral Encapsulation Format (hereafter, TNEF), which "wraps" Microsoft e-mail attachements.
		Fortunately, the tnef filter can be used by any MIME-aware client to unpack these attachments.
		Here's a sample definition: application/ms-tnef; tnef -w %s This mailcap entry says that whenever the MIME content type: application/ms-tnef is encountered, use this command to decode it: tnef -w %s The latter command string invokes tnef, specifying both the -w option and the attachment (created as a temporary file) as command line arguments.
	trillian.mit.edu /~jc/man/tnef (468 words)

	Software Installations and Upgrades (Site not responding. Last check: 2007-10-16)
		A single TNEF attachment may contain several files, but oftentimes it contains only RTF (Rich Text Format) formatting and highlighting enhancements to the text portion of the message.
		These kind of files can be opened using the tnef program, now available on the elements machines as well as blitz.
		In case you are having trouble running the software, file a ticket at: http://ticket.cs.pitt.edu explaining the problem in detail (use your AFS login and password).
	www.cs.pitt.edu /~tech/software/2004-01-30.html (129 words)

	Notes/Domino 4 and 5 Forum : RE: Attachments are being lost (Site not responding. Last check: 2007-10-16)
		If one recipient message is formatted using Outlook rich text and the other is not; the recipient receiving the message using Outlook Rich Text will not receive the message correctly while the recipient not using the Outlook Rich Text format will receive the message fine.
		Transport Neutral Encapsulation Format, or TNEF, is a format of encapsulation used exclusively by Microsoft to send a message using Microsoft Rich Text.
		TNEF is helpful when sending Outlook items such as Contacts and Mail messages and other form based.
	www-10.lotus.com /ldd/46dom.nsf/d6091795dfaa5b1185256a7a0048a2d0/fd112e308a9f107085256dcc0061538a?OpenDocument (812 words)

	Russ Harvey Consulting Services - Resources - E-mail Software and Issues
		Description of Transport Neutral Encapsulation Format (TNEF) in Outlook 2000 gives a fuller explanation of this issue and the solution.
		TNEF's Enough is a solution for Mac OS 9 and X users.
		Adobe® Acrobat® locks the format into the document and the Adobe Reader is free (and already installed on most computers), making it an excellent choice.
	www.russharvey.bc.ca /resources/mail.html (2132 words)

	PC World - Microsoft Patches Two Critical Flaws
		The second vulnerability relates to the TNEF (Transport Neutral Encapsulation Format) encoding format used by Outlook and Exchange.
		But because the TNEF bug can affect server software as well as the client, it is particularly noteworthy, he said.
		The TNEF flaw is rated critical for Outlook 2000, 2002, and 2003, as well as Exchange Server 5.0 and 5.5 and Exchange 2000 server.
	www.pcworld.com /printable/article/id,124336/printable.html (361 words)

	[No title]
		output_to_core - TNEF attribute data will be saved in core memory unless it is greater than this many bytes (default: 4096).
		If all you want are the attachments, then this is mostly garbage, but if you're interested then you can see all the garbage by turning on debugging.
		datahandle() is a method for attachments which takes a TNEF attribute name, and returns the data for that attribute as an object which is the same as a MIME::Body object.
	www.cpan.org /modules/by-module/Convert/DOUGW/Convert-TNEF-0.17.readme (626 words)

	JTNEF - Java TNEF package
		Transport-Neutral Encapsulation Format (TNEF) is Microsoft's non-standard format for encapsulating mail which has any non-plain-text content or properties (such as rich text, embedded OLE objects, voting buttons, and sometimes just attachments).
		Once a TNEF message is used, the entire message, including all the original attachments and properties, is encapsulated in a single attachment of mime type "application/ms-tnef" added to the message to be sent over the Internet.
		The Java TNEF package is an open source code implementation of a TNEF message handler, which can be used as a command-line utility or integrated into Java-based mail applications.
	www.freeutils.net /source/jtnef (882 words)

	West Virginia School of Osteopathic Medicine (Site not responding. Last check: 2007-10-16)
		The use of TNEF is commonly affected by settings in Outlook that are referred to as Microsoft Outlook Rich Text Format (RTF).
		Rich Text Format and TNEF are not exactly the same, but they are closely related.
		By not sending TNEF messages, the recipient is able to view and save the attachments as expected.
	www.wvsom.edu /computerservices/Docs/outlook/outlook2002/format.cfm (472 words)

	WinDeveloper TNEF View
		In the left pane message properties are organized in a tree structure reflecting the internal encoding of TNEF messages.
		The Transport Neutral Encapsulation Format, TNEF, is an integral part of MAPI.
		TNEF is normally embedded within SMTP mails as an attachment named winmail.dat.
	www.windeveloper.com /OLView/olview_guide.htm (1271 words)

	Security Advisory
		The Vulnerability is caused by buffer overflow in the process that Outlook and Exchange Server validates the length of a message before it passes it to the allocated buffer.
		Transport Neutral Encapsulation (TNEF) is a format used by the Microsoft Exchange Server and Outlook e-mail clients when sending messages formatted as Rich Text Format (RTF).
		When Microsoft Exchange thinks that it is sending a message to another Microsoft e-mail client, it extracts all the formatting information and encodes it in a special TNEF block.
	www.determina.com /security_center/security_advisories/securityadvisory_jan102006_2.asp (417 words)

	TNEF Stream Structure
		A TNEF stream begins with a 32-bit signature that identifies the stream as a TNEF stream.
		The remainder of the stream is a sequence of TNEF attributes.
		All integers in a TNEF stream are stored in little-endian binary form, but are shown in hexadecimal throughout this appendix.
	msdn.microsoft.com /library/en-us/mapi/html/16cc2cac-7662-415e-aab8-fb1044aeb14f.asp?frame=true (404 words)

	KTNEF Library: KTNEF - an API for handling TNEF data. (Site not responding. Last check: 2007-10-16)
		Selecting RTF (Rich Text Format) 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.
		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.
	developer.kde.org /documentation/library/cvs-api/kdepimlibs-apidocs/ktnef/html/index.html (207 words)

	What is an MS-TNEF email attachment? - Knowledge Base
		By default, Exchange and Outlook send email messages as if they will be received by other Microsoft email clients, extracting the formatting out of the original document and encoding it into a TNEF block.
		They then send the message in two parts: the first part is the text, while the second is the formatting.
		However, you will not see the extra formatting ordinarily added by Outlook or Exchange, and the attachment will be of no use.
	kb.iu.edu /data/ahwv.html (238 words)

	KCSOS : Technology Services : MS Outlook Uses Non-Standard Format (TNEF)
		The full name of the format is "Transport Neutral Encapsulation Format", but that is a misleading name...
		it may be neutral on transport, but it obstructs reception.
		If your e-mail program receives a TNEF file and doesn't understand it, instead of seeing the e-mail and/or attachment, you may only see an attachment named "Winmail.dat", "Part 1.2", or something else ending in ".dat" or ".eml".
	kcsos.kern.org /technologyServices/tnef (378 words)

	Discussion Printout: Exchange2000-Missing Attachments (Site not responding. Last check: 2007-10-16)
		Also even if "Plain Text" or "HTML" format is selected in the OUtlook, then also "winmail.dat" file is included in the mail sent between 2 outlook clients within one domain and the problem still occurrs after selecting plain text.
		The file allows Outlook users to send Transport Neutral Encapsulation Format (TNEF) information along with the email so that it retains the look and feel of the document with formatting, fonts, and colors when its received by another Microsoft Outlook user.
		Also, when both sender and receiver are OUtlook clients, then this format issue should not crop up.
	techrepublic.com.com /5206-6251-0.html?forumID=50&threadID=170559 (193 words)

	Explaining Exchange Message formats (Site not responding. Last check: 2007-10-16)
		These are different coding methods defined for the transportation of non ASCII characters in plain text documents and non text documents like Images, Voice and Video for transportation through text based delivery systems like e-mail or the Usenet.
		TNEF is short for Transport Neutral Encapsulation Format and is a proprietary file format used by Microsoft in Microsoft Outlook and Exchange Server to define a file format for attachments in e-mail messages.
		Although this format is not strictly an e-mail messaging format, some earlier versions of e-mail messaging clients require that a line break is placed after the seventy-sixth or seventy-seventh character.
	www.msexchange.org /tutorials/Explaining-Exchange-Message-formats.html (1500 words)

	Microsoft Outlook TNEF handling (aka Winmail.dat or "Part 1.2" problem of unopenable email attachments)
		Installation of tnef on Windows is not as trivial as I'd like, in part because on Windows it requires installing the "Cygwin" tool first.
		Now the tnef tool is installed, but you need to configure your GUI to auto-run the tnef tool on these files.
		At the time of this writing, no one has been inspired enough to add direct support for TNEF in Thunderbird; I think many think the better solution is to get Outlook users to fix their clients, since they are the ones sending nonstandard files.
	www.dwheeler.com /essays/microsoft-outlook-tnef.html (1776 words)

	IMIBO - Down To The Metal
		Interfaces created by the transport in response to service provider interface (SPI) calls, including status interfaces, are hooked to the transport logon object and invalidated when MAPI logs off the transport.
		The sample transport protects itself against concurrency problems in the remaining cases where they might arise (in the status interface, for instance).
		The transport design does not lend itself to asynchronous detection because the file system does not notify the transport when new messages arrive.
	www.imibo.com /imidev/delphi/DownToTheMetal/Default.htm (1845 words)

	mozdev.org - lookout: index
		The TNEF decoding engine was inspired (with permission) by the tnef.sf.net project.
		Transport Neutral Encapsulation Format or TNEF is a proprietary e-mail attachment format used by Microsoft Outlook and Microsoft Exchange Server.
		It should be noted that TNEF encapsulations will put a higher net and proc load on the IMAP server (or any other server for that matter).
	lookout.mozdev.org (407 words)

	Microsoft Fixes Nasty Outlook, Exchange E-Mail Bug -- Microsoft security patches -- InformationWeek
		Outlook and Exchange are vulnerable because of the way they decode the Transport Neutral Encapsulation Format (TNEF) MIME attachment.
		TNEF is used by Exchange and Outlook when sending and processing messages formatted as Rich Text Format (RTF), one of the formatting choices available to Outlook users (the others are Plain Text and HTML).
		An attacker could gain full control of a Windows PC by sending a specially-formatted message to an Exchange Server and/or Outlook 2000, 2002, or 2003 user; unlike other attacks, ones based on this vulnerability wouldn't have to dupe users into opening e-mail attachments.
	www.informationweek.com /hardware/desktop/175803300?cid=rssfeed_pl_dtp (527 words)

	[No title]
		Top of sectionTop of section Vulnerability Details TNEF Decoding Vulnerability - CVE-2006-0002 A remote code execution vulnerability exists in Microsoft Outlook and Microsoft Exchange Server because of the way that it decodes the Transport Neutral Encapsulation Format (TNEF) MIME attachment.
		Mitigating Factors for TNEF Decoding Vulnerability - CVE-2006-0002: • Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
		Impact of workaround: If TNEF attachments are blocked, e-mail messages that are formatted as RTF will not be received correctly.
	ftp.sunet.se /pub/security/csir/ciac/bulletin/q-fy06/q-096.tnef.decoding.txt (2285 words)

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