I understand you're using cPanel hosting, but not a cPanel email address for your forms and applications. Be sure to check the "Email Routing" area (in your cPanel Admin) for any emails being sent out from the website. You should have it set for "Remote Mail Exchanger" or "Automatically Detect Configuration". Try them one at a time to see if this will resolve your issue with email output.
TLH - GoDaddy | Community Moderator Supporting you at x.co/247support