is it possible to have a email sent confirming registration

Once people have registered is there a way for a automatic email to be sent from us?

I believe you are referring to the Email Autoresponder. By setting up an autoresponder on your form, your submitters will receive an email confirming their registration. 

Here are some guides that will help you create an autoresponder.

Creating-a-Form-Autoresponder

Notification-Autoresponder-Email-Details

I hope this helps. Let us know if you need any further assistance. Thank you.