Chapter 16. SPAM, WORMS, AND VIRUSES (PLUS EMAIL, IF YOU INSIST)
The Internet’s killer application is email, no matter what you hear from the marketing office down the hall. Email is so ubiquitous that it has become the preferred delivery mechanism for unsolicited advertising, viruses, worms, and other malicious communication, simply because everybody on the Internet has it. This chapter discusses how to handle email flow in the server-to-server case, the client-to-server case, and the server-to-client case. On today’s Internet, each of these situations uses a slightly different protocol.
FreeBSD excels as a mail server and handles millions of ...
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