Spamassassin for all accounts

[schani@]

Hallo, i must change the individual SA control to one global SA Filter for the hole Server. How is the best way to use only one Bayes Database. I want to teach the SA by sa-learn and set the black and white list for all accounts an domains.

Thanks for help

Christian

PS: i use Plesk 7.5.3 on SuseLinux