Pending payment email not sending emails anymore after an almost hour

someone has paid or not, I get an email alert that a form has

Hi,

You can actually check also with your account the sent email logs. You can see this in the Email History log.

User Guide: http://www.jotform.com/help/293-How-to-view-all-your-form-Email-History

Can you confirm that the notification email do arrive in your email inbox, BUT they were just delayed or did not arrive in your expected time that they should be coming.

There can be other factors that can be causing the delay in the arrival of the notice email -- but we need to understand first if this is indeed the issue you are  having.

Thanks.