First, launch the Mail app that comes with Windows. In the search bar, type mail and hit enter… that will launch the Mail app. Or, if you have a little white envelope in your task bar, click that.
Select Accounts from the left sidebar.
Select the account you wish to delete.
The settings page for that account will be displayed. Select Delete Account.
The Mail app gives you a chance to change your mind. If you are sure, select Delete to remove the account from the app.
