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.
Your current recipient in the form has been added to our bounce list and I think this is because of the PDF Attachment and Send Uploads as Attachment features. You both features enabled in the email settings.
You are using Gmail and we don't have any issues with Gmail so I think you have accidentally marked the emails as spam or per your settings, the emails have been filtered as spam. Please whitelist Jotform in your Gmail account, add firstname.lastname@example.org to your safe sender/contact list.
For email related issues, the following guide will help.