The IGS Anti-Spam System can be configured to scan each message destined for your mailbox or an external e-mail address. The contents are compared with common key words and phrases often used by senders of unsolicited E-mail. Each match of a key word or phrase increases the "Spam Score" of the message. If the "Spam Score" exceeds the sensitivity level that you define, the message will be either tagged or deleted according to the action you specified. You may even use a combination of both tag and delete where messages up to a defined sensitivity level are tagged, and then automatically deleted at some higher and above defined level.

The most common way to get lots of junk e-mail, and therefore should be avoided, is by responding to such mail. In general, responding to junk e-mail, especially the ones that claim you can be removed from their mailing list, is the best way to get more junk mail. The best thing to do with junk e-mail is delete it, do NOT repsond.