Basic Authentication with POP3

Figure 8-7. Basic Authentication with POP3

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As you can see in the figure, Conner sends both a username and a password to the server. The server checks its list of usernames and passwords and finds a match. So, the server tells the client "OK," meaning that the server is ready to start forwarding e-mails to the client. POP3 also tells the user how many e-mails are waiting for him. To get the e-mails, the client asks for the e-mails, one at a time, as shown in the figure.