Although many internet users now delete spam before opening it, these unwanted eMail messages still steal bandwidth when passing through school or district servers. MicroWorld Technologies Inc. claims its X-Spam software is more effective at catching spam compared with other anti-spam solutions, including free and paid programs.

X-Spam, the company says, is highly intelligent software that uses an advanced heuristic filter engine combined with two proprietary features--Regular Expressions and Meta Tests--that refine spam identification to an art. Regular Expressions are rule sets to identify spam, and each one has a score associated with it. When eMail messages are tested for...

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