No longer receiving email notifications

I have set up several forms that have automatic notifications and they're no longer working. Even a test email is not getting through.

Any ideas what may be causing it?

Regards

Russell Grief

Cambridge Regional College

We apologize for the inconvenience that may have caused. Can you please check your email's spam/bulk folder?

Also please try to change form's notification sender email address to noreply@jotform.com or noreply@formresponse.com and see if the said issue still persist or not.

 Also please check the below article related to email notification issues:

http://www.jotform.me/help/208-How-to-setup-email-alerts-to-prevent-emails-not-being-received-issues