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 have seen you have several forms, on which particular form are you not receiving the email notifications?
I have checked the mail log for firstname.lastname@example.org and it seems all the deliveries have failed, I have also removed it from the bounce list, kindly check you email notification to ensure there is no space before the email then try submitting using your form.
Also ensure that you white-list jotform's domains on your mail server.