MailSuite Pro comes with Bayesian antispam filter which helps protecting mailboxes from unsolicited mail. However, sometimes that may be not enough due to tons of spam coming through botnets. If this is the case, you will need a way to block various ranges of IPs, and MailSuite Pro allows that by means of setting up SPAMMERS.TAB configuration file.
You can download ready-to-use configuration file here. This database is created by ourselves, addresses were collected during real attacks of spammers. We are going to update this database from time to time in the future.