Email Notifications: Why isn't the recipient email address receiving emails?

I have one person in my building who is not receiving email notifications when the form is submitted.  It is set up for them to get it.  I assume something in their email is blocking Jotform but i have no idea where to even start looking.  Please help. 

I have been checking the email recipient address on your form and noticed that all the emails have been sent, the address does not seem to be in our bounce list either. 

You may also check your email history by following this guide: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History 

I would recommend you to check this guide that will also help you to know why emails may not be sending: https://www.jotform.com/help/364-Why-I-am-not-Receiving-Email-Notifications

If you keep experiencing the issues, please try setting up an SMTP sender on your form, as this will use you own mail server you should not experience issues with your emails: https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form 

I hope this helps.