Exchange Server Virus Scanning

Question: What product would you recommend for virus scanning on our Exchange mail server?

The IT Guy says:
Sybari's Antigen for Microsoft Exchange is a robust virus scanning solution for districts running MS Exchange. It provides the ability for real-time scanning of incoming and outgoing messages. The "worm purge" feature stops known worms and contains attacks before they spread across your network to other users.

Although virus scanning does impose a hit on server performance, it is wise to consider using more than one virus scanning solution for mission critical servers including mail servers. Because commercial antivirus companies are in competition with each other, often there is not a great deal of sharing of information about new threats. Therefore, a new threat identified by one company may not be identified as readily by another, and their product may therefore not be effective against that new threat as quickly.

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