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.
The recipient email of your form: http://www.jotform.us/form/21905257146150, was in bounce list: https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List
It has now been removed from bounce list, so this should solve the problem. In addition to this, please check your spam/junks folder, and if you find any email coming from JotForm, make sure to mark it as NOT SPAM:
Let us know if you need more help, we will be glad to assist you.