Forms are not being received to designated e-mail

Hi, my client owns a domain e-mail address from Register.com

I pointed the form on Squarespace to send the form to his domain e-mail address, and he doesn't receive anything from Squarespace (nothing in Spam folders, too).
However, his domain e-mail address works normally, but just doesn't receive any e-mails from Squarespace forms. 

When I tried pointing the form to his regular Yahoo e-mail address, it works and he receives the Squarespace forms. It's just when I point to his Domain e-mail address, it doesn't work. He doesn't get anything.

What kind of problem is this? Maybe it's Squarespace form problem or his domain problem?

Any suggestions will help.

Thanks!
Joe

Hey Joe

I am experiencing this EXACT same behaviour with a client of mine too. Did you find a fix in the end? 

Cheers

Phil

Me too!