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How To Open a Winmail .Dat File

Updated February 21, 2017

A Winmail DAT file is a computer file containing data relating to the installation of Windows Mail on your computer. The program itself uses these files to keep track of various information, the specifics of which will change the more you use the program. If you want to open a Winmail DAT file on your computer, all you need to do is use the native Windows word processing utility, "Notepad."

Right-click on the Winmail DAT file.

Click "Open With."

Click "Notepad" to open your Winmail DAT file on your computer.

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About the Author

Stephen Lilley is a freelance writer who hopes to one day make a career writing for film and television. His articles have appeared on a variety of websites. Lilley holds a Bachelor of Arts in film and video production from the University of Toledo in Ohio.