E-Mail Setup Preferences
Required to setup and test before setup e-mail notifications.
Main menu -> Preferences -> Mail Setup
This is example for Gmail, but you can try to setup email with your Internet provider(ISP) SMTP mail server address, if you have one or more email address assigned from ISP.
Yahoo and Gmail (probably many other email servers) does not support any more, as they called, less secure applications with standard Username and Password authentication, without specific permission setup at your account. OAUTH is not supported in Arduino Control Center at this moment.