You have built your local IP blacklist for Postfix. Invested time to analyze server logs or Rspamd history to blacklist single hosts, IP addresses, or even whole networks. But how well is it working compared to public blacklists you are using? Time to see the results and get some visual insights through Munin Monitoring System.
Setup your blacklist for Munin First of all, you have to decide how to visualize the data in your graph.