![]() Well, you could tell the sender to configure their email client to So, you just received a nonstandard format - now what? Microsoft Exchange can be configured to stop sending nonstandard formats. Mozilla Firefox and Thunderbird, but just about any alternative Installing a virus checker - yes, Windows systems also need virusĬheckers, but cover your oozing wounds before worrying about innoculations.Ī simple and free way to do that is to get Replacing them with more secure applications is more important than These two programs are the top two ways that Windows systems get exploited. Is to stop using Microsoft Outlook and Internet Explorer. One of the best ways to improve the security of Windows clients TNEF in this case, even if you've told it not to. One oddity: don't send a calendar entry / meeting invitation andĪn attachment in the same message some versions of Outlook will send In the "Send in this message format" list, click "Plain Text" or "HTML",.On the "Tools" menu, click "Options", and then click the "Mail Format" tab.If you prefer, in all versions of Outlook, you can disable TNEF completely: To either "Convert to HTML format" or "Convert to Plain Text format". Set "When sending Outlook Rich Text messages to Internet."Mail Format" tab, and then the "Internet Format" button. On the "Tools" menu, click "Options", then click the.Ideally, convince your IT department to fix your whole organization.Īccording to MozillaZine, Outlook 2002/XP and Outlook 2003 shouldīe configured this way so that email sent outside is not corrupted: Other people can read the files you send :-(. Outside your office, you have to reconfigure Outlook so that If you use Microsoft Outlook, and want to send attachments Program, used by a group of people to send and receive email with the Program, used on the desktop) and Microsoft Exchange (their "mail server" ![]() The problem seems to be two-part: Microsoft Outlook (their "client" You can get software to read this file format, if you need to Something else ending in ".dat" or ".eml". You may only see an attachment named "Winmail.dat", "win.dat", "Part 1.2", or Instead of seeing the e-mail and/or attachment, If your e-mail program receives a TNEF file and doesn't understand it, In fact, even Microsoft's own Outlook Express can't read this format! Lotus Notes, Thunderbird / Netscape Mail, and Eudora. Most other email readers cannot read this nonstandard format.Įmail clients that can't (currently) read this format include The full name of the format is "Transport Neutral Encapsulation Format",īut that is a misleading name, because it obstructs reception due (such as MIME and HTML) directly for attachments, but Outlook fails to do so What Outlook is supposed to do is simply use the industry standards When it sends email - typically when it sends attachments. Use a nonstandard extra packaging mechanism called "ms-tnef" or "tnef" The basic problem is that in certain cases Microsoft's Outlook or The Problem: Microsoft Outlook sometimes sends a non-standard format (TNEF) Here's a brief explanation of the problem, and what to do about it. They only received a file named (typically) "Winmail.dat", "Win.dat", or "can't open the attachment" of an email, because Wheeler (first released )Īll too often nowadays people report that they Microsoft Outlook/Exchange MS-TNEF handling (aka "Winmail.dat", "Win.dat", or "Part 1.2" problem of unopenable email attachments) Microsoft Outlook/Exchange MS-TNEF handling (aka "Winmail.dat", "Win.dat", or "Part 1.2" problem of unopenable email attachments) David A.
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