分析了SMTP报文的组成和Exchange在传输邮件时的路由过程（包括 AQ, Routing Engine等组件）。-This paper specifies the anlysis of the combination of SMTP and the process of routing in the Exchange(including AQ,Routing Engine and so on).

邮件传输 利用smtp协议实现简单的发送邮件和接受邮件-Mail Transfer smtp protocol to send mail and receive mail