Result codes are matched to groups of rules. Although Arm Research strives for perfection in all of their rules and rule groups, each system is slightly different and experiences subtle differences in the accuracy of each rule group. When Message Sniffer locates a pattern in a message it will return a result code that matches the associated rule group. If you use a weighting system to evaluate the results from Message Sniffer, such as Spam Assassin, mxGuard, or Declude, then you can adjust the weights for each rule group individually. This allows you to weight the more accurate groups heavily on your system while weighting the less accurate rule groups less heavily.