Content submissions are passed through a set of registered and enabled filter strategies, each of which check the submitted content and may assign karma points to it. The sum of these karma points needs to be greater than or equal to the minimum karma configured here for the submission to be accepted.
${strategy.karma_help}
The spam filter plugin can optionally log every content submission so that you can monitor and tune the effectiveness of the filtering. The log is stored in the database, and can be viewed under “Spam Filtering → Monitoring” from the web administration interface.