A Safety Quota-variable Mail Transfer Protocol under Isolated Environment

Abstract

Abstract The information security problems of e-mail have become a major threat of the network information security in recent years. In this paper, we did deeply analyze on the principles and safety of the protocols of e-mail system, such as SMTP and ESMTP. An improved protocol based on SMTP and ESMTP was proposed, and protocol mode was designed as well. The protocol was denominated as Safety quota-variable Mail Transfer Protocol (SVMTP) under isolated environment. The results show that svmtp protocol has more obvious effect in blocking suspicious connections, security classification and minimizing the waste of communication resources.