The best way to receive a list of potential clients for your business is to obtain your information via targeted research.  While there are several companies that will provide business mailing lists, you cannot always be sure that those you are contacting are actually interested in what you are trying to sell.  Some lists are created by doing some targeted research to find only those businesses that would be interested so that you are not wasting money by marketing to the wrong people.  These types of lists are also easy to obtain by contacting the right mailing list company.  With a free quote, you will be sure that you are getting just what you want before placing your order.