24.1 Introduction
Email messaging is the process of distributing written messages to computer users over a network. Although there are several email protocols in use today, the Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending emails over the Internet. In fact, most of us use SMTP-based client-server email systems regularly for delayed, asynchronous, two-way communication with others.
The Simple Mail Transfer Protocol utilizes a store-and-forward model for data transmission. Within this model, the sender’s email client forwards a message to the ...
