this solution is probably what I need:
Originally Posted by till
Do the settings to disable some amavis functions in the global amavis configuration file so they get applied to all emails except the ones you set policys for in ispconfig. So spam filtering will work as usual for the domains and addresses you configured in ispconfig but will be disabled for all non configured domains, so this will get applied to outgoing emails.
but I am not too familiar with amavis settings .. can you specify settings to disable amavis functions please? Do you mean something like you described here