Try your answer and did not work
I built a form from your templates and the emails are sent ok if I turn off my EIMS email server. If the EIMS email server is on the form will not email. I get message that the port is in use. It seems your form and my email server is bring use by the same port (25) to function. Any work arounds. Apple computer and EIMS email server. The EIMS SMPT server is on port 25.
I tried to (Go to Window -> Server Behaviors and double click the Universal Email server behavior) and set up behaviors and it still does not work.
I turn off the EIMS server and your form sends fine, but I can't get mail from any where else.