Permission marketing is an extremely important aspect of Internet marketing for any business. While legislation imposes restrictions on what you can and cannot send via email, permission marketing can be a valuable asset to any marketing campaign if it is used in the right way. This chapter provides details on what permission marketing is and how it can be incorporated into your site. Private mail list marketing provides all the details on how it is sent, how to grow your database, and how to make sure your permission-based email is not treated as spam.