邮箱服务器的SSL证书是什么?企业邮箱SSL如何设置加密?企业邮箱SSL证书及其加密设置详解
What is the SSL certificate of an email server? How to set encryption for enterprise email SSL? Detailed Explanation of Enterprise Email SSL Certificate and Its Encryption Settings
以上为机器翻译结果，长、整句建议使用 人工翻译 。