467614 Email Autoreponder with unique file link

This is what we are looking for client enters his email address on a form, the system automatically respond to the email address provided s with a unique link to download a product or file from our system and a short message for the client .. this link will expire after a given time and can only be used once, the clients email address is stored to a file which we can retrieve later its almost like a storefront but you dont neeed to pay but you can get a file budget LOW .. this is a trial to as bigger project