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 checked the email address you mentioned you aren't receiving emails for above.
The reason you were not receiving the emails to that address is because it ended up in our bouncelist so I have removed it for you.
Result: firstname.lastname@example.org is IN the bounce listReason(s) : smtp; 550 5.1.0 LuCE1t00s0FQya001uCFZ1 authentication failed
If it happens again please see https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List so that you can remove it again if necessary.
Also, please refer to these guides which can help more: