2. The computer-implemented method of claim 1 , wherein the step of detecting potential spam emails based on the one or more spam detection rules comprises: detecting email messages having substantially identical content.
2. The computer-implemented method of claim 1 , wherein the step of detecting potential spam emails based on the one or more spam detection rules comprises: detecting email messages having substantially identical content. 4. The computer-implemented method of claim 2 , wherein the step of detecting potential spam emails based on the one or more spam detection rules comprise: determining, by the network-based computer system, if the email messages having substantially identical content are sent from different share sites.