make sure you are adding the dynamic data bindings to display the form data in the body of the email.
Go to Window -> Server Behaviors.
in the list of server behaviors, double click the Universal Email server behavior.
On the body tab, click the DW Edit icon to edit the email that is sent.
Go to Window -> Bindings to open the bindings panel.
Expand the form collection, and drag each of the form data bindings to the page where you would like to display the forms output.