I have maia installed and was working fairly well on a suse linux distribution, with postfix etc. The amavisd log file grew to 19 gigs without my knowledge and crashed the server.... ouch
the server after file deleted was ok and most mail is being delivered however the spam mail is not being handled correctly. Should be for expert minutes easy to find and fix.
however I have never felt the system was working correctly and would like you to spend and hour updating and checking all the related configurations.... and please make sure all logs are rotated weekly:)