How do I check to make sure an email is not getting bounced from receiving a submitted form?

Some of my recipients are stating that they are not receiving submissions.   I know that JF implemented a process to validate an email but cannot find it.

You can view you account email history from the account page:

https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History

Any emails that bounced will be labelled as such in the history.