Forms not going to the email address specified in form notifier

Hi I created a form for a client a few years ago and it has worked good until recently. The forms are showing up on my jotform inbox for each of the forms but it is not going to the email specified anymore. Any thoughts?

I have checked the form embedded in the website you have provided and was able to view the email address where email notifications should be sent upon form submissions. I have not seen any traces of failed email submissions, meaning all emails were sent. You can also check that through your account's history. How-to-view-all-your-form-Email-History

Can you try if changing the Sender Email of the Notifier to noreply@jotform.com would solve the issue?

If you do not want our email addresses noreply@jotform.com or noreply@formresponse.com to be set up as the Sender E-mail, you need to white-list our Jotmail IP addresses within your email server (or ask for it to your email service provider). Read this article for more details: http://www.jotform.com/help/145-Whitelisting-JotMails-IP-Addresses