By default, Antispam is set to false in the Dashboard Settings section. It is designed to be used by site Admins who want to be able to allow or block certain domains, based reputation, after a user had submitted an article!

When Enable Spam Checking is set to true, it uses 4 different files to log the information that will be used in future articles submissions. If the domain of the article being submitted exists in the blacklist domains, the submission will be blocked and logged as Spam!