Electronic Mail (e-mail)
Electronic mail service (known as e-mail in short) enables an Internet user to send a mail to another Internet user in any part of the world in a near-real-time manner. An e-mail message takes a few seconds to Serveral minutes to reach its destination , because it travels from one network to another , unitl it reaches its destination.
E-mail service has many similarities with postal-mail service. All Intenet users have an e-mail address, just as all us have a postal address. Each Internet user has a logical mailbox, just as each one us has a mailbox in our house. When sending a mail to another user, a sender specifies the e-mail address of the receiver, just as we write postal address of the receiver of of a post in postal mail system. E-Mail service delivers an already sent mail into its receiver's mailbox. The receiver extracts the mail from his/her mailbox and reads it at his/her own convenient time , just as in a postal-mail system. After reading the message the receiver can save it , forward it,delete it to someone else , or respond to it by sending another message back.
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Messages in e-mail service can contain not only text documents but also image , audio, and video data only restriction is that the data must be in computer -readable formate.
With e-mail service , the Internet has proved to be a rapid and productive communication tool for millions of users . As compared to paper mail, Telephone, and fax many prefer e-mail because of its following advantages:
1. Unlike telephone , the persons communicationg need not be available at the same time
2. It is faster than paper mail.
3. Unlike fax documents , the receiver of an e-mail documents can store it in a computer , and can edit it easily using editing programs.
