Fighting SPAM with postfix and fail2ban

After detecting spammers with an RBL list you can block them for a predefined period of time with the help of fail2ban. How does it work:
– fail2ban parses mail.log
– when a spammer IP is found it is added to a temporary list
– future requests from the spammer’s IP is blocked

  1. Check smtpd_recipient_restrictions  in /etc/postfix/
  2. Double-check that you are NOT using google DNS (aka
  3. Add to  /etc/fail2ban/jail.local
  4. Create /etc/fail2ban/
  5. Restart fail2ban and test config

    Similar readings:
    Adaptive DDOS IDS firewall

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