I have developed my own application that periodically reads and parses all the MDaemon log data into a structured my-sql database by a php service. This service makes it possible to make a detailed analisis of mail traffic. Users can see which mails are rejected , and the detailed analisis can be done by the administrator. We can see top mail sender addreses, top mail sending hosts, top mail receving clients, top spam originators and so on. So, I can see the most efficient blacklists , and create my own blacklist on the firewall. This feature must be added in the next version of MDaemon.