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I have checked yours forms and found an email address, this is not in our bounce list and the email log shows that emails are being sent as normal.
In on of your forms you have not set properly the email address, here is an image about how it is set currently on this form http://www.jotformeu.com/form/61415826358359
I would suggest you to properly set your email address, otherwise emails will not be sent upon submissions.
If you are still not getting emails, please follow this guide in order to avoid bouncing: How-to-Setup-Email-Alerts-to-Prevent-Email-Bouncing-Related-Issues
You may also check and remove an email address from our bounce list by following the steps on this guide: How-to-Remove-Your-Email-Address-from-Bounce-List
If this still persists, here is a link where you will find our email server details, you will need to ask your email provider to white-list our IP addresses: Whitelisting-JotMails-IP-Addresses
Hope this helps.