As a Researcher, Dr. P. Mano Paul has written a Thesis on "Prevention of Cyber Attacks using Email Spam Detection and Mitigation Protocols in Cyberspace". I have been formulating this Thesis along with my guide Dr. Ravi R, a Professor from Francis Xavier Engineering College, Tirunelveli, India. Here in this thesis I brought out three protocols like Collaborative Reputation Vector Space Model, Probabilistic E-shield Protocol and Optimized Feature Selection Protocol with many metrics measured from Accuracy to Overall Throughput. Among these protocol Optimal Feature Selection Protocol outperforms other protocols by creating very less overhead.