Abstract: Email service, a prevalent internet service, stands as one of the indispensable system services within campus
networks. Email communication offers convenience in daily work and academic pursuits. However, it has also emerged as a
primary target for cyberattacks. Amid the increasingly grave challenges in cybersecurity, the secure operation and
maintenance of email systems and the safety management of communications have become crucial focal points in
information security protection for campus networks. This paper conducts an analysis of the current email security situation
and puts forward countermeasures against email security risks from multiple perspectives, including the establishment of a
comprehensive security technology architecture system, the implementation of secure extension protocols, the reinforcement
of information security and account protection, the enhancement of email gateway security, and the improvement of user
security awareness. These measures play a crucial role in advancing information security on campus environments.

Key words:  ,  , email｜information security｜risk analysis｜defense｜cybersecurity｜mail gateway