Hi Mike
First of all, you should go to Users -> Users Manager to create a new user to see that user receives email from the system or not.
If that user doesn't receive email, the problem might come from your mail server and you will need to contact your hosting provider asking them to check it for you.
If that user still receive email, please submit a support ticket sending us admin and FTP account of your site so that I can check to see what's wrong and get it corrected for you
Regards,
Tuan