Hi there, I am running two mailservers, first one serving two domains, other one serving one domain.
Both serve as backup mx for each other. Both know about users and aliases of the other domain(s). On both systems, spamassassin is configured to read/store userprefs and bayes data (per user) in a local mysql database. Both systems reject email if the score exceeds a certain limit. To avoid backscatter (or the need to accept any spam not rejected by the backup mx), both servers should do their spam filtering based on exactly the same information, including bayes data. Now, the question is, what is the best way to share bayes data between two (or more) servers? I already share userprefs by setting up master-master replication between the two mysql databases on both servers. This is uncritical, since users (or admins) will update only userprefs for the local virtual users on each system, which means, backup mx will never touch primary mx userprefs. But bayes data may be updated by either the primary mx or the backup mx, since email may arrive at either server. I've set up a testing environment that also uses master-master replication of the mysql bayes database, with priority in dns set to equal for both mx to get incoming mail distributed evenly to both systems. So far, this seems to work, but this is a low load environment. Any suggestions? Regards, Robert -- Robert Senger
