一服务安装查看安装rpm -qa grep sendmailrpm -qa grep dovecotrpm -qa grep cyrus安装邮件服务器安装所有服务Sendmail-安装pop3imap服rpm -ivh dovecot 安装用户认证安装所有cyrus-sasl-二安全配置(1)修改sendmail配置vi etcmailsendmail.mc1)取消如下两行的注释(删除