How To Use Red-Hot Sales Letters To Promote Your Musical Talent! Red hot sales letters using direct mail – the key to mail order success! Did you know that you can reach millions of prospective customers for your musical services and/or products through the use of mail order? In these days of the World Wide Web, we have almost forgotten that many fortunes have been made using the lowly direct mail letter. Doesn’t seem very flashy anymore, does it? But flashy or not,..