Watch It Run
With Meridius in front of my e-mail servers, it acted as a dedicated mail transfer agent and funneled all inbound traffic through it. I also used the box as an SMTP relay appliance to bounce occasional bulk mailings out of the shop.
I used the LCD to configure IP settings during initial setup. Installing the Java management console on a Windows XP client was straightforward; I was in business after half an hour of effort, which included making a few changes to the mail schema. I modified the canned quarantine message with some custom text, set the quarantine autodelete to four days, and linked the live data feeds for antivirus and one of my monitoring terminals via HTML. I didn't implement any custom white- or blacklists (this feature wasn't ready). I just sat back to watch the appliance do its thing for some 900 e-mail accounts.
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During my three months of testing, the school received 1,180,380 e-mail messages, of which 22,251 (1.9 percent) were virus-infected and 1,004,011 (85.1 percent) were quarantined as spam. Of the quarantined messages, 994,631 (99.1 percent) were tagged by the RPD system, and only 3,907 (0.4 percent) were released as false positives. Meridius' mistaken-catch rate for legitimate messages was less than 0.04 percent.
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