barracuda 300 pop3 filtering question

Hello I am try to filter spam that gets to my pop3 mail boxes. I believe ba rracuda has a pop3 proxy that cleans spam. Can I use the appliance to clean pop3 mail boxes from spam? Will the barracuda 300 allow user to manage the ir spam on the firewall gui? I dont want to buy the appliace if it is not g oing to work. I found a few on ebay for $100. Can a used appliace be licens e if I buy on ebay? Can the appliace be used with out a support plan? Thank s.

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