Contact form does not send email if from an aol user

I have a contact form page here…
https://www.themorganreport.com/contact-us

If the user fill out the information and enters this email address as and AOL.com email, we never receive the email. Which goes to [email protected].

After extensive testing, it seems this only fail when the user enter and aol email address.

So the form works fine unless the user filling out the form uses and AOL email address. Then the email is not sent to us.