Electronic mail is also known as e- mail. It is used for exchanging digital messages from one person to more recipients. Email services are operated on the Internet or many computer networks. Email service is used for instant messaging. Email services are accepting forward, deliver and store messages. E- Mail message includes three components such as the message envelope, the message header and the message body. The header of message includes control information like email address of one or more recipients. The electronic mail is the transmission of messages through communication networks. The messages are entered from the keyboard. In this service, you can send messages more than one person at the same time. Many of the e- mail systems include text editor and it is used for composing messages. These types of services are called as broadcasting. Any kind of business need email service. Email marketing is more popular in these days and it is more cost effective.