If you need to test your SMTP setup just go to Settings -> Email on the right side Send Test Email enter your email address and click the submit button. If the SMTP is setup corectly you will receive green notifications saying that your email is setup corectly also an email will be sent to the email address you entered othweside a debug message from the email client will be shown.
Consult with your hosting provide if you dont know how to setup SMTP email.