These are the pertinent e-mail settings:

E-Mail Transport Method PHP
E-Mail Linefeeds LF
Use MIME HTML When Sending Emails true
Send E-Mails true
Email Archiving Active? false
E-Mail Friendly-Errors true
Email Address (Displayed to Contact you) [email protected]
Email Address (sent FROM) [email protected]
Emails must send from known domain? Yes

The client has the emails setup with the domain registrar versus the web host if that makes a difference. But the forms are not sending emails.. What should I look at next to troubleshoot this??