毕业论文 电子邮件客户端软件VIP免费

目录1引言...........................................................................................................................11．1电子邮件介绍................................................................................................11．2开发背景........................................................................................................21．3开发环境及运行环境....................................................................................21．3．1开发环境...............................................................................................21．3．2运行环境...............................................................................................22软件架构及系统用例图......................................................................................32．1系统架构........................................................................................................32．2系统总体用例................................................................................................32．3程序功能框图................................................................................................42．4发送邮件类....................................................................................................42．5附加小功能类................................................................................................43SMTP协议的研究...................................................................................................53．1SMTP协议简介及工作原理...........................................................................53．1．1介绍......................................................................................................53．1．2SMTP模型.............................................................................................53．2SMTP协议的命令和应答.............................................................................63．2．1SMTP协议的命令..................................................................................63．2．2SMTP的应答码....................................................................................134RFC822..................................................................................................................154．1RFC822简单介绍.......................................................................................154．2信件的头部................................................................................................154．2．1信头的一般格式.................................................................................154．2．2结构化字段和非结构化字段...............................................................164．2．3信头字段的元素.................................................................................164．2．4标准的信头字段..................................................................................175命名控件MailSend..........................................................................................205．1发送邮件类SmtpMail..........................................................................................215．1．1主要成员变量说明........................................................................................215．1．2主要成员函数说明........................................................................................215．2AddE...