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 your email logs and found that it landed in the bounce list with the following error:
Reason(s) : smtp; 553 5.3.0 flpd584 DNSBL:ATTRBL 521< 18.104.22.168
I have now removed your email address from the said bounce list. But I'm suspecting that the next email delivery will land your email in the said list again. So your solution is to please change your email notification sender addresses from firstname.lastname@example.org to email@example.com.
Another possible measure to take is to contact your email service provider and ask them to whitelist the IPs and domains found from this guide: https://www.jotform.com/help/145-Whitelisting-JotMails-IP-Addresses
You can learn more on how to address concerns for emails landing in the bounce list from this guide: https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues