Spammers Using Sender ID
Spammers have started publishing their own Sender ID records, allowing their email to speed through anti-spam filters, according to this IDG News Service article.
Sender ID works by providing out-of-band notification of what IP addresses are authorized to originate email for each domain. So what the spammers have done is sign up for $5 domains, published records saying that their machines are authorized, and then they send away.
In other spam news, Savvis has canceled some more high-speed lines that spammers had purchased.
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