Electronic mail or simply E-mail is very much popular now-a-days for its speedy transmission of information and cost effectiveness . Hence information provided by a sender is delivered asynchronously to a point where it can be retrieved and processed later on by one or more recipients of the sender choice . in an E-mail system there is a number and the sender keeps on dialing the desired number is successful . Once it is connected the PC terminal of the sender sends the message to the PC terminal of the recipient at a very high speed . There is no need of any physical presence of both the sender and the receiver
The sender can enter the message and the receiver can retrieve it whenever is free . the ill remain in PC memory . The transmission of messages is usually done through landline telephones or satellite communications or through marine cables .