Spam Filtering

• Behaviour filtering
  • Short Term Rate Limit
  • Medium Term Rate Limit
  • Greylisting
  • Greylisting server
  • Greylisting Performance
• Content filtering
  • Pattern Matching
  • URL filtering
  • Heuristic filter (Oracle)
  • Bayesian Filtering
  • Defining actions
  • Using j-chkmail headers
• Other filtering methods
  • Reputation - RWL/RBL
    • dnsbl.j-chkmail.org
  • Recipient Access
  • Bad Sender MX
  • Miscelaneous...

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