How do I receive email notifications that a form has been submitted?

Normally when we direct someone to our website to fill out a form and they submit it I get an email notification that someone has completed a form.  This doesn't seem to be happening anymore.  How do I fix that?

Please advise.

We are having email issues recently. JotForm emails are falling into spam folders of some of the email providers. Could you please check your email spam box? If JotForm emails are there, could you please select all of them and mark them as not spam.