E-mail marketing (on the Internet) is popular with companies for several reasons:A mailing list provides the ability to distribute information to a wide range of specific, potential customers at a relatively low cost, Affiliate Millionaire. E-mail marketing allows you to communicate more information, more often. Many companies use e-mail marketing to communicate with existing customers, but many other companies send unsolicited bulk e-mail, also known as spam. Opt-in e-mail marketing may evolve into a technology that uses a handshake protocol between the sender and receiver. In addition to satisfying legal requirements, e-mail service providers began to help customers establish and manage their own e-mail marketing campaigns.