Most of spam filters work on single computer, so they can only obtain limited information and affect is not satisfying. Furthermore, many spam makers apply the new technologies and approaches to make and send spam constantly, which is challenging the traditional anti-spam technique based on contents. In this paper, we propose Identifying Technology of Spam Sending Behavior Based on P2P (ITSSB). According to bulk sending characteristics of spam and the advantages of mixed P2P network, an anti-Spam P2P network on the basis of super-peer is designed. Then, we put forward the algorithm for email c...