How to uninstall the Mail app on Windows 10 (and then reinstall it again)
(Windows Phone Central)

If you want to get rid of the built-in Mail app on Windows 10, we`ll show you how. On Windows 10, the Mail app comes with the Calendar companion, and together they offer the default experience to manage multiple email accounts and calendars on your device. Although the app offers a great experience for most users, it`s not for everyone. But if you try to remove it, the Settings app won`t allow let you because it`s a built-in app. Luckily, you can use the PowerShell command-line tool to remove the Mail app on Windows 10 permanently or reinstall it to fix sync and other issues. ...