Why can't I open the Winmail.dat file that I received in an email?

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Why can't I open the Winmail.dat file that I received in an email?

You may receive an additional file called Winmail.dat along with an email attachment if the message is sent using Microsoft Outlook's Rich Text Format. The Winmail.dat file is usually small and doesn't contain any information that is useful to the recipient of the email. Then why did you receive it you ask? It's a file used to preserve the formatting of the email that is sent. Email applications like AOL, Thunderbird, Mail.app, and Eudora can't recognize the Winmail.dat file and therefore won't be able to open it.

Note: This issue occurs only if the sender is using Microsoft Outlook 2000 or 2003 to send emails. If you don't want to receive Winmail.dat files, please ask the sender to resend the email using plain text format. To learn how to change mail settings to plain text format, direct the sender to How do I change the mail settings to plain text format?




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Last updated: 01-03-2013
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