RAV AntiVirus for MailServers X for Mac lies within System Tools, more precisely General.
From the developer:
RAV AntiVirus for MailServers is the most advanced email virus protection platform available.
You may want to check out more software for Mac, such as MailServe for Lion, MailServe for Leopard or Curse of the Raven CE, which might be similar to RAV AntiVirus for MailServers X.
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