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 is in our bounce list upon checking which causing the issue.Result: firstname.lastname@example.org is IN the bounce list
Reason(s) : 5.1.0 - Unknown address error 521-'220.127.116.11 blocked by ldap:ou=3Drbl= mx,dc=3Datt,dc=3Dnet\nError - Blocked for abuse. Contact abuse_rbl@abuse-at= t.net.'
I've already remove it for you and it should be working fine now.
Feel free to contact us again if you need further assistance.