SpamGate acts as an email Firewall preventing attacks against your critical internal e-Mail servers. Commercial businesses with 1,000 to 5,000 mailboxes are using SpamGate to filter Spam, Viruses, Hoax email and Phishing attacks. SpamGate supports unlimited users and unlimited domains for an affordable price. SpamGate uses the strongest AntiSpam Engine available as well as checking each email message against public Internet Spam databases such as DCC, Razor, Pyzor and Real Time Blackhole lists. SpamGate also checks the content of each HTML email message for URI links that are registered as promoting products via Spam mail. The SpamGate is server is updated daily for the latest set of AntiSpam rule definitions and hourly for the latest virus definitions. SpamGate can be configured with advanced features such as "GreyListing". GreyListing requests the senders MTA to retransmit the first email message before it is accepted. 80% of the spammers will not respond to a retransmit request.