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 now removed the email address from the bounce list.
But in order to prevent this from happening again, can you try setting an SMTP email on your account and use it as your sender address for the email alerts that are sending to firstname.lastname@example.org?
Here is a guide on how to setup SMTP on your account: https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form
If you have questions, please let us know.