Auto-responders (also known as mailbots, automatic email and email on demand) are great promotional tools that you'll find it very useful tool. They provide the easiest way to automate the selling process. They are basically email versions of the fax on demand services that have proved to be very successful in recent years. Instead of you personally having to reply to each and every enquiry about your service or product, sending out sales letters, order confirmations and thank you letters, etc., you can set up an auto-responder to do all this for you. This way you, save your valuable time for those promotional activities that really do need your personal attention.