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.
Please be noted that when you input email address in the textbox, you need to press "Enter" button or press "Spacebar" key and that should solve your problem. Please check the screenshot below:
Do try it out and get back to us if the issue persists.