In simple terms, Email Marketing also called Direct Mail Marketing or Bulk Email Marketing means sending emails to potential and existing customers about details of new and existing products and services. The extensive use of email marketing services to advertise on the Internet is for everyone to see. The number of emails sent out with the purpose of marketing is close to billions. At the same time the consumer's inbox is overflowing with private, commercial, business and spam email. Hence, email marketing can serve its purpose only when it stands out among the crowd of other mails and manages to catch the eyes of the target audience.