forms bouncing back

Several forms i have embedded into my websites are bounching back to the customer.

How can i resolve this?

Thanks in advance

Bluma

First of all I would suggest you to follow this guide in order to prevent bouncing: http://www.jotform.com/help/208-How-to-setup-email-alerts-to-prevent-email-bouncing-related-issues. 

Now, since the issue is with your customer's email and not with your email, it could be a bit hard to check all the emails, if you know the emails then you will be able to check if it's in our bounce list, to do it just follow this guide: http://www.jotform.com/help/262-How-to-remove-your-email-address-from-bounce-list. 

Hope this helps.