A cyberattack that shut down Blue Security also felled thousands of blogs when the antispam site deflected the malicious hits, analysts said.
They may have signed up for the service to stay free of unsolicited e-mail, but people in Blue Security's "Do Not Intrude Registry" are getting spammed, the company said on Wednesday.
When e-mail from Optus customers started getting blocked by other Internet service providers last week, the company turned to its biggest rival for assistance.
COMMENTARY--The EU's anti-spam laws recently came into effect, but they are unlikely to make any difference at all because most spam comes from outside the EU. Instead, take the spam problem into your own hands and beat them at their own game.
A triumvirate of influential advertising groups is pushing Congress to pass a federal spam law before the holidays, cautioning that without it, unwanted e-mail will hamper e-commerce.
The security software specialist buys anti-spam company Deersoft, the first in a series of planned acquisitions by the company to help people thwart unsolicited e-mail.
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