What to do when you receive an attachment called “winmail.dat”?

When you send and receive e-mails, you may find that the attached file is called “winmail.dat”.

This may be a PDF file or an Office file, but it is caused by some kind of error. In this article, we will show you how to deal with such cases.

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Operation Procedure

  1. Download the attachment called “winmail.dat”.
  2. Go to “
  3. Click the [Select File] button and select the “winmail.dat” file that you just downloaded.
  4. Click on the “Convert winmail.dat” button, and the file will be converted to a normal file and start downloading.

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I am Japanese, and my computer is set up in Japanese. So there may be some differences in the names of the buttons and windows.

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