If Spamfire misses a spam message and passes it through to your email program, you can report it to us at Matterform. We may be able to create a Remote Filter to target that spam. Then the message will be automatically identified for all Spamfire users around the world.
To report a message to Matterform, find the message in the Spamfire Mail window, select it, and click the Revenge button. In the Revenge Options window that appears, check Report low-scoring spam to Matterform (along with any other Revenge options that interest you) and click Take Revenge.