I'm having a problem using what is commonly known as the Email Admin action in Ninja Forms 2.9.56.2. Basically, GoDaddy is not sending the form to my client, whose email address is the same as the domain (i.e. client@mydomain.com).
For what it's worth, I am the admin for my client's website so the email address under the Settings tab is my email address, not my client's email address. Not sure if this matters or not.