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 took a look at the form that you have mentioned and I see that it only has email notification.
Now based on what you have mentioned, it seems as if the email autoresponder is not being received.
Email notification - email that is sent to you about the form being submitted
Email autoresponder - email that is sent to people filling out the form to confirm the submission
Looking at the form however it only has email notifier set.
When checking the email notifier, I see that the email is in the bounce list. This means that your server has stopped accepting emails from JotForm.
This is the reason that your email server sent back:
smtp; 550 Service unavailable; Client host [a10-27.smtp-out.amazonses.com] blocked by zen.spamhaus.org; 18.104.22.168 (**********@fsh******:blocked)
To resolve this, I have removed your email from the bounce list, but you will need to ask for JotForm to be removed from the blacklist that your server uses - or to whitelist the same.
You can pass the link to the following guide to your IT team or your email server administrator: Whitelisting JotMails IP Addresses