Vamsoft Ltd. Software
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Open Relay Filter Enterprise Edition
ORF Enterprise Edition is an enterprise-level anti-spam solution that helps you to block spam before it reaches your network. ORF uses DNS blacklists (DNSBL/RBL databases like MAPS) and has its own tools to stop spam on SMTP protocol level.
Keywords: exchange spam filter dnsbl open relay rbl email filter anti-spam high-performance anti-spam tool exchange server