I have been using cpanel until now to manage my email and I find it much easier then Google Apps. How can I get it that when someone emails [email protected] an auto-responder goes out to the author saying that someone will be in touch.

Do i have to make a new User and set it from the personal settings on the Gmail page? What happens when I have these fake email addresses in bulk?

EDIT: When I create a nickname for info@domain to go to [email protected] there is no User of info. So how can I do an autoresponder