Originally Posted by
xchs
The mail server complains about the "from" domain name. You would have to use an email address with a domain name hosted on GoDaddy. That said, for your registered domain name (e.g. example.com) just set up an email address "foo@example.com", i.e. with the same domain name.
You may want to set the recipient email address in the form settings accordingly as well as the "E-mail address of the website administrator" in the "Website root" page settings (see "Site structure")
In case you want to use a different mail server, populate all the relevant input fields for the SMTP configuration (see the "System settings") with the appropriate SMTP credentials and hostname.