Email marketing enhances the relationship with their current customers, by repeating business with them. In laymen's terms, the procedure of sending emails to customers is known as email marketing. The major advantage of email marketing is that it doesn't consume a lot of time. It is a minimal consuming resource and is also cost-efficient. Within a short period of time, a large audience can be targeted. Features such as Subscriptions, bounced messages, web bugs, and click through's, help enables businesses to track potential customers. Since the customers can be directly reached, feedbacks can be easily collected. Also, In terms of cost, it is not as expensive as newsletters. Reports have proven that this is the next best marketing technique after search marketing. It is effective in tracking the returns on investments.