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Figure 32.1 |
An example e-mail message. Lines of the header begin with a keyword and a colon; a blank line separates the header from the body . |
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Figure 32.2 |
Examples of keywords found in Internet mail. |
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Figure 32.3 |
The path of an e-mail message. The mail transfer program on the sender's computer becomes a client of the remote mail server. |
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Figure 32.4 |
An example SMTP transfer between a client on computer example.com and a server on computer foobar.com. Each line is labeled to show whether the client or server transmits the line. |
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Figure 32.5 |
An example database used by a mail exploder. Each entry is assigned a name and contains a list of e-mail addresses. |
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Figure 32.6 |
The path of a message as it passes from a sender's interface through a mail gateway. On the gateway computer, an exploder handles incoming e-mail, and a conventional mail transfer program sends a copy to each recipient. |
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Figure 32.7 |
The path of e-mail when POP is used to access a mailbox. The mail can arrive from the sender's computer or a mail gateway. To retrieve messages from the mailbox, a user runs a program that becomes a client of the POP server. |
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Data file 6 |
SMTP session with delivery of one mail message |
