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.
If your Autoresponder is set correctly emails will be sent to your users when they submit your form, if they have entered correct email address.
I have checked few email addresses that I found is submissions of form you provided and all Autoresponder emails were sent successfully.
You can also ask your users if they have received Autoresponder email.
Feel free to contact us if you have any other questions.