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Global dependence upon email as a mission-critical
businesses resource continues to grow exponentially. With the increasing
proliferation of Microsoft Exchange Server has come a simultaneous
and growing increase in unsolicited email. Spam continues to significantly
and negatively impact the productivity of this vital resource.
At Castellan we deploy two free spam solutions together for best results. Incoming mail is first sent to a Linux based system running SpamAssassin. Unsolicited mail is tagged and then forwarded to the Exchange server which is running Microsoft’s Intelligent Message Filter. This combination provides outstanding results for our customers at very low cost.
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Our Mission
