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I check the notifications for your form: https://www.jotform.com/50585090859970, and the recipient email is not in bounce list: https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List
Have you checked your spam folder? One thing I noticed is that one of the notifications is missing the sender name, please assign to it a field or your form where the user enters his name:
In addition to this, you may white-list our domain names, if the issue continues, as we use Amazon SES method for "firstname.lastname@example.org" sender:
Let us know if you need more help.