by Matthew G. Naugle
Wiley Computer Publishing, John Wiley & Sons, Inc.
ISBN: 0471196568 Pub Date: 11/01/98
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Illustrated TCP/IP
by Matthew G. Naugle Wiley Computer Publishing, John Wiley & Sons, Inc. ISBN: 0471196568 Pub Date: 11/01/98 |
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The following slide shows the relationship between SMTP, DNS, and POP. In this example, mail is sent from your PC to Joe’s PC. In order to accomplish this, the send mail (SMTP) program is established to the SMTP server on your ISP. A DNS lookup is accomplished using the root DNS server to find the domain of the intended recipient. A call is made to recipients DNS to find the mail server (which could be the same server as the DNS). Once the mail server is found (its IP address is found), mail is sent to that server. The POP function delivers it to your mail box on that mail server so that when Joe’s PC retrieves mail, your mail message will be waiting.
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