The Red Condor Message Assurance Gateway Appliance blocks malicious email before it reaches the customer mail server, removes the burden of DDoS and DHA attacks, and provides a fully redundant system solution including 96 hour emergency spooling of inbound email. The Message Assurance Gateway 2700 Appliance is capable of handling up to 5,000 mailboxes, and is scalable to hundreds of thousands of mailboxes when configured in a clustered multi-appliance architecture. The appliance locates the Red Condor anti-spam/anti-virus (ASAV) software within the customer's network, but leverages the shared resources of the Red Condor Security Operations Center (SOC) to provide up-to-the-minute managed service.