This assumes you already have an existing email account, and it's configured in Windows Mail.
Now let's learn how to configure notifications.
Click the Settings icon, then click Notifications.
Choose the account for which you want to setup notifications.
To turn notifications on, ensure the Show notifications in the Action Center is set to On.
Then select the type of notifications you want. In this case, I'll choose to show a notification banner, and play a sound.
Click anywhere outside the Notifications window.
That's it! The notification settings have been configured.
This is the end of the tutorial. You now know how to configure the notification settings in Windows Mail.