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 email address landed in our bounce list which results that your forms appear to be not working. I have now removed the said email address from the bounce list but I'm not sure if it will resolve the problem due to the reason given by your mail server:
Reason(s) : smtp; 591 firstname.lastname@example.org your host [188.8.131.52] is blacklisted by dnsbl.sorbs.net. Currently Sending Spam See: http://www.sorbs.net/lookup.shtml?184.108.40.206.. Please send this message to email@example.com
To fix this, can you try using firstname.lastname@example.org as your email alert sender address on your forms? You can make this change when editing your email notification, go to Advanced, and scroll down to Sender Email to change the sender address.
After this, you may monitor your email deliveries to see if they are sent or if it fails by following the steps from this guide: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History
If the problem with the bounce list inclusion persists, please let us know.