19. The method of claim 17 , wherein the message is associated with a message recipient, and wherein the step of performing the second specified action comprises sending the message to the message recipient.
17. The method of claim 11 , wherein the method further comprises the step of: when the reputation score is better than a second predefined threshold, performing a second specified action associated with responding to messages that are not unsolicited, wherein the first predefined threshold is different from the second predefined threshold.