JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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It looks like your email address was added to the bounce list, which is why you are not receiving the notifications. I have now removed the email address from the bounce list so you should receive the next email notifications successfully.
To prevent further bouncing related issues, you may check out this guide on How to Prevent Email Bouncing Related Issues. You can also follow this guide if your other email addresses gets added to the bounce list: How to Remove Your Email Address from Bounce List.