基于SMTP协议电子邮件收发系统的设计资源-CSDN文库

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目 录
1 引言..........................................................................................................................................1
1．1 电子邮件介绍....................................................................................................................1
1．2 开发背景............................................................................................................................2
1．3 开发环境及运行环境........................................................................................................2
2 软件架构及系统用例图..........................................................................................................3
2．1 系统架构............................................................................................................................3
2．2 系统总体用例....................................................................................................................3
2．4 发送邮件类........................................................................................................................4
2．5 附加小功能类....................................................................................................................4
3 SMTP 协议的研究..................................................................................................................4
3．1 SMTP 协议简介及工作原理............................................................................................5
3．2 SMTP 协议的命令和应答................................................................................................6
3．2．1 SMTP 协议的命令......................................................................................................6
　　RECIPIENT (RCPT)...........................................................................................................7
　　TO:<@HOSTA.ARPA,@HOSTB.ARPA:USERC@HOSTD.ARPA>..............................7
　　FROM:<@HOSTA.ARPA:USERX@HOSTY.ARPA>......................................................7
　　TO:<@HOSTB.ARPA:USERC@HOSTD.ARPA>...........................................................7
　　DATA (DATA).....................................................................................................................7
　　Return-Path: <@GHI.ARPA,@DEF.ARPA,@ABC.ARPA:JOE@ABC.ARPA>..............8
　　Received: from GHI.ARPA by JKL.ARPA ; 27 Oct 81 15:27:39 PST...............................8
　　Received: from DEF.ARPA by GHI.ARPA ; 27 Oct 81 15:15:13 PST..............................8
　　Received: from ABC.ARPA by DEF.ARPA ; 27 Oct 81 15:01:59 PST..............................8
　　Date: 27 Oct 81 15:01:01 PST............................................................................................8
　　From: JOE@ABC.ARPA....................................................................................................8
　　Subject: Improved Mailing System Installed......................................................................8
　　To: SAM@JKL.ARPA........................................................................................................8
第 I 页 共 II 页

　　This is to inform you that ...................................................................................................8
　　SEND (SEND)....................................................................................................................8
　　SEND OR MAIL (SOML)..................................................................................................9
　　SEND AND MAIL (SAML)...............................................................................................9
　　VERIFY (VRFY)..............................................................................................................10
　　EXPAND (EXPN).............................................................................................................10
　　NOOP (NOOP).................................................................................................................10
　　QUIT (QUIT)....................................................................................................................10
　　TURN (TURN).................................................................................................................10
　　MAIL Mail mail MaIl mAIl..............................................................................................11
RCPT <SP> TO:<forward-path> <CRLF>...............................................................................11
DATA <CRLF>.........................................................................................................................11
RSET <CRLF>..........................................................................................................................11
SEND <SP> FROM:<reverse-path> <CRLF>.........................................................................11
SOML <SP> FROM:<reverse-path> <CRLF>.........................................................................12
SAML <SP> FROM:<reverse-path> <CRLF>.........................................................................12
VRFY <SP> <string> <CRLF>................................................................................................12
EXPN <SP> <string> <CRLF>................................................................................................12
HELP [<SP> <string>] <CRLF>..............................................................................................12
NOOP <CRLF>........................................................................................................................12
QUIT <CRLF>..........................................................................................................................12
TURN <CRLF>........................................................................................................................12
4 RFC822..................................................................................................................................14
4．1 RFC822 简单介绍...........................................................................................................14
4．2 信件的头部......................................................................................................................14
5 命名控件 MailSend...............................................................................................................20
5．1 发送邮件类 SmtpMail.....................................................................................................20
5．2 AddExtra 类......................................................................................................................27
5．2．1 调用 Windows API 所需的命名空间.......................................................................27
第 II 页 共 II 页