Zombie trick expected to send spam sky-high, Cnet News.com, 2 Feb 2005

“According to the SpamHaus Project--a U.K.-based antispam compiler of blacklists that block 8 billion messages a day--a new piece of malicious software has been created that takes over a PC. This "zombie" computer is then used to send spam via the mail server of that PC's Internet service provider. This means the junk mail appears to come from the ISP, making it very hard for an antispam blacklist to block it.�

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