Rejecting spam during SMTP sessions

• Main Authors: Marsono, Muhammad N., El-Kharashi, M. Watheq, Gebali, Fayez
• Format: Book Section
• Language: English
• Published: Institute of Electrical and Electronics Engineering (IEEE) 2007
• Subjects: QA75 Electronic computers. Computer science
• Online Access: http://eprints.utm.my/id/eprint/9602/1/MuhammadNMarsono2007RejectingSpamDuringSMTPSessions.pdf; http://eprints.utm.my/id/eprint/9602/; http://dx.doi.org/10.1109/PACRIM.2007.4313219
• Institution: Universiti Teknologi Malaysia

This paper analyzes a spam rejection scheme at Simple Mail Transfer Protocol (SMTP) sessions. This scheme utilizes a layer-3 e-mail pre-classification technique to estimate e-mail classes before an SMTP session ends. We study the spam rejection scheme using discrete-time Markov chain analysis and analyze the performance of the proposed scheme under different e-mail traffic loads and service capacities. The proposed scheme reduces the e-mail volume to be queued and processed by e-mail servers. This reduces non-spam e-mail queuing delay and loss, and protects e-mail servers from being overloaded by spam traffic.