I am using Matts Formmail and am wanting to be able to send an automatic response to the e-mail address that is entered into the form. I have set up an auto-response on my e-mail server but when it receives the form it is always from an unknown sender so it has no idea who to respond to.

So, my question is - is this possible and if so, how do I set it up? If it is not possible, any other suggestions?