No notice on my email when people register

I used to get an email every time the participant registered on the registration form that I created, but I don't get the notice any more, why?

I have checked your account email history and I can see the emails have been sent without any problems, you may also check your email history following this guide: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History 

Also, please kindly check your spam/junk folder since the emails may have ended up there. 

Here's also a guide that will help you to know why emails may not be sending: https://www.jotform.com/help/364-Why-Am-I-Not-Receiving-Email-Notifications 

If the problem persists, let us know.