What is the best solution to use as an alternative to a barracuda firewall we have 4-5 cent os servers with plesk installed and would like to build an appliance to block spam. the integrated plesk tools can pre processor intensive at times and a independent box would work best for us. I found some older articles but would like to know which how to, to follow to get us on the right track.
You could use one of the "Virtual USers And Domains..." tutorials from the Postfix category and then forward the mails to the other servers, or you configure the other servers to fetch the mails from the Anti-Spam firewall with fetchmail or getmail.
