通过使用数字证书构建校园网服务器安全、校园网电子邮件安全、校园网一卡通等系统的安全。

Through using the digital certificates to structure systematic security, such as campus network's server security, E-mail security, All-purpose Card and so on.

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建立一个安全的电子邮件系统，仅仅依赖安全标准还远远不够，还需要保障邮件服务器本身的安全性。

Build a safe email system, count safe level merely far insufficient still, still need to guarantee the security of mail server itself.

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本文针对这些问题并结合我们的实践，介绍了建立安全、可靠的电子邮件服务器系统的方法及采取的措施，包括邮件病毒的过滤、系统参数的安全配置、用户的安全认证等。

This paper aims at the problems to introduce the method of building a secure and reliable Email server system, including virus filtering, configuring the system and users certification.

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