JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I checked your notification's email address and it was in the bounce list. I fixed the issue, you should be fine now.
In the future, you can check and fix your email status by yourself. You can find detailed information HERE.
Also, you can set your notification's mail by using THIS manual to minimize the bounce list risk.
For further assistance, please feel free to ask.