Advanced Custom Forms Feature – Email Confirmation

I am using the advanced form feature and have created a completely custom registration form. One field in my form is for email address, and I am looking to send an email to the address entered after a user submits the form.

Currently, the ‘destination_email’ field is used to send a notification to myself and my colleague that a user has filled out a registration. But we also want to have an email sent to the user confirming they have successfully filled out the form. I originally thought I’d be fine with the “success pop-up”, but am learning that some users prefer to have/save/print a confirmation email (for full context).

Does anyone know PHP for grabbing a form field (the email address for me) after it is submitted? I think if I can figure that out I can just use the PHP mail function to send a custom successful registration message…?

Any help/suggestions would be greatly appreciated!

http://ww.wp.xz.cn/extend/plugins/custom-contact-forms/