What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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 see that there is no issue with the email address used for notifications. I've tried submitting one of your JotForms and see that the email is sent successfully from our end.
If you are referring to your JotForm titled Pay Online, I see that the last submission received on 29th June. As I tried to submit this Payment form, it redirected to PayPal without any issue. I notice that there some incomplete payments that you may need to look at. Please refer to the guide with FAQs on Incomplete payments.
Hope this information helps!