If you wish to set or change the default mail app on a Microsoft Windows 10 system, you can take the following steps:
- Click on the Windows Start button.
- Click on Settings.
- Click on System.
- Click on Default apps.
- Click on "Choose a default" under Email.
- You should then see a list of email applications on the system; click on the one you wish to be the default mail application.
- Once you've chosen an email program, you can click on the "X" at the upper, right-hand corner of the window to close it.
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