Email marketing is the most popular marketing tactics used by all the companies because of the low investment. Even the smallest of the companies use it to reach out to the larger number of people. But one may wonder that how these companies build such a huge email database? This article discusses only the legitimate methods being used to build the database. In a world where online marketing is surpassing conventional forms of marketing media, your email database is your most valuable asset. With more and more people entering the digital arena every day, marketing to an email database should no longer be regarded as a secondary means to derive extra revenue, but rather, it should be embraced as a primary marketing tool in its own right, one which ultimately drives sales and maximises return on investment. Not convinced? Read on and discover exactly why your email database is crucial to the success of your business. Email databases make a highly effective and economical way of advertising for business owners. They prove very effective, as the message is delivered to targeted prospects. Sending your ads arbitrarily to a large number of people far exceeds the cost of sending email messages to their mailbox. Building an email database for marketing purposes can be an area of great challenge in ophthalmology practice management. Using email to communicate with patients and potential patients is a powerful marketing tool, but how do you build your initial list, and how can you make it-and your practice-grow?