Open-source spam filter developers are claiming that their software can now block 99.97 percent or more of incoming spam on a network, thanks to new techniques.

If the claims hold true, the software could lead to a new generation of antispam solutions and give vendors of commercial spam filters a run for their money.

The first announcement came last week when William Yerazunis, the developer of the open-source CRM114 spam filter, posted a message to his website claiming that his software made only one error while filtering 6,000 messages in a recent test.

By Amit Asaravala at Wired.

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