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RFC821-简单邮件传输协议(SMTP)中文版-3_PHP

程序员文章站 2022-04-29 23:45:27
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SMTP 本文出自: 作者: (2001-11-23 09:08:00)
第二步:转发主机到目的主机

R: 220 BBN-VAX.ARPA Simple Mail Transfer Service Ready

S: HELO USC-ISIE.ARPA

R: 250 BBN-VAX.ARPA

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: 250 OK

 

S: DATA

R: 354 Start mail input; end with .

S: Received: from MIT-AI.ARPA by USC-ISIE.ARPA ;

2 Nov 81 22:40:10 UT

S: Date: 2 Nov 81 22:33:44

S: From: John Q. Public

S: Subject: The Next Meeting of the Board

S: To: Jones@BBN-Vax.ARPA

S:

S: Bill:

S: The next meeting of the board of directors will be

S: on Tuesday.

S: John.

S: .

R: 250 OK

 

S: QUIT

R: 221 USC-ISIE.ARPA Service closing transmission channel



确认和发送

R: 220 SU-SCORE.ARPA Simple Mail Transfer Service Ready

S: HELO MIT-MC.ARPA

R: 250 SU-SCORE.ARPA

 

S: VRFY Crispin

R: 250 Mark Crispin

 

S: SEND FROM:

R: 250 OK

 

S: RCPT TO:

R: 250 OK

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: QUIT

R: 221 SU-SCORE.ARPA Service closing transmission channel



获得和发送邮件 首先确定用户名,然后尝试将邮件发送到用户终端,
当它失败时,发送到用户邮箱。

R: 220 SU-SCORE.ARPA Simple Mail Transfer Service Ready

S: HELO MIT-MC.ARPA

R: 250 SU-SCORE.ARPA

 

S: VRFY Crispin

R: 250 Mark Crispin

 

S: SEND FROM:

R: 250 OK

 

S: RCPT TO:

R: 450 User not active now

 

S: RSET

R: 250 OK

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: 250 OK

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: QUIT

R: 221 SU-SCORE.ARPA Service closing transmission channel



上述问题的更有效的作法

R: 220 SU-SCORE.ARPA Simple Mail Transfer Service Ready

S: HELO MIT-MC.ARPA

R: 250 SU-SCORE.ARPA

 

S: VRFY Crispin

R: 250 Mark Crispin

 

S: SOML FROM:

R: 250 OK

 

S: RCPT TO:

R: 250 User not active now, so will do mail.

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: QUIT

R: 221 SU-SCORE.ARPA Service closing transmission channel



  邮件列表 首先,两个邮件列表中的每一个在不同主机的不同会话上扩展,
然后,通过转发主机向列表上的用户发送邮件。

第一步:扩展第一个列表

R: 220 MIT-AI.ARPA Simple Mail Transfer Service Ready

S: HELO SU-SCORE.ARPA

R: 250 MIT-AI.ARPA

 

S: EXPN Example-People

R: 250-

R: 250-Fred Fonebone

R: 250-Xenon Y. Zither

R: 250-Quincy Smith

R: 250-

R: 250

 

S: QUIT

R: 221 MIT-AI.ARPA Service closing transmission channel

 

第二步:扩展第二个列表

R: 220 MIT-MC.ARPA Simple Mail Transfer Service Ready

S: HELO SU-SCORE.ARPA

R: 250 MIT-MC.ARPA

 

S: EXPN Interested-Parties

R: 250-Al Calico

R: 250-

R: 250-Quincy Smith

R: 250-

R: 250

 

S: QUIT

R: 221 MIT-MC.ARPA Service closing transmission channel

 

第三步:通过转发主机向包括于两个列表中的所有用户发送邮件

R: 220 USC-ISIE.ARPA Simple Mail Transfer Service Ready

S: HELO SU-SCORE.ARPA

R: 250 USC-ISIE.ARPA

 

S: MAIL FROM:

R: 250 OK

S: RCPT TO:

R: 250 OK

S: RCPT TO:

R: 250 OK

S: RCPT TO:

R: 250 OK

S: RCPT

TO:

R: 250 OK

S: RCPT TO:

R: 250 OK

S: RCPT TO:

R: 250 OK

S: RCPT TO:

R: 250 OK

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: QUIT

R: 221 USC-ISIE.ARPA Service closing transmission channel


转发的情况

R: 220 USC-ISIF.ARPA Simple Mail Transfer Service Ready

S: HELO LBL-UNIX.ARPA

R: 250 USC-ISIF.ARPA

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: 251 User not local; will forward to

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: QUIT

R: 221 USC-ISIF.ARPA Service closing transmission channel

第一步:尝试第一台主机上的邮箱

R: 220 USC-ISIF.ARPA Simple Mail Transfer Service Ready

S: HELO LBL-UNIX.ARPA

R: 250 USC-ISIF.ARPA

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: 251 User not local; will forward to

 

S: RSET

R: 250 OK

 

S: QUIT

R: 221 USC-ISIF.ARPA Service closing transmission channel

第二步:尝试第二台主机上的邮箱

R: 220 USC-ISI.ARPA Simple Mail Transfer Service Ready

S: HELO LBL-UNIX.ARPA

R: 250 USC-ISI.ARPA

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: OK

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: QUIT

R: 221 USC-ISI.ARPA Service closing transmission channel

许多接收者的情况

R: 220 BERKELEY.ARPA Simple Mail Transfer Service Ready

S: HELO USC-ISIF.ARPA

R: 250 BERKELEY.ARPA

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: 250 OK

 

S: RCPT TO:

R: 552 Recipient storage full, try again in another transaction

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

 

S: MAIL FROM:

R: 250 OK

 

S: RCPT TO:

R: 250 OK

 

S: DATA

R: 354 Start mail input; end with .

S: Blah blah blah...

S: ...etc. etc. etc.

S: .

R: 250 OK

S: QUIT

R: 221 BERKELEY.ARPA Service closing transmission channel



名词表:


回车


空格

ASCII
美国标准信息交换码

主机
拥有SMTP进程或邮箱的网络计算机

发送SMTP进程
与接收SMTP进程一起工作的进程。发送SMTP开始传输服务连接,它发出
SMTP命令,接收应答,管理邮件的传送

用户
希望获得邮件服务的人(或以人的名义出现的进程),还有就是邮件的接收者。

会话
当传输信道打开时进行的一系列信息交换

传输服务
可靠的面向流的数据通信服务。例如:NCP,TCP,NITS。

传输信道
在发送SMTP和接收SMTP之间建立的全双工的用于交换命令,应答和邮件内容的信道

字符
可显示字符串


以一个结束的邮件内容

应答
接收SMTP对发送SMTP的通过传输信道发送的的对某一命令的(成功或不成功的)
响应。应答的一般格式是应答码加一段文本。通常情况下,应答码供机器使用,
而文本用于人类用户使用

邮件内容
一系列的字符串,它们符合ARPA Internet文本信息格式标准的标准字符集

邮件内容结束标记
标明邮件内容结束的特定字符

邮箱
指定应该向何处发向用户的信件的地址(字符串)。它通常由用户名和主机名表示

命令
由发送SMTP发送到接收SMTP的要求一个邮件服务操作的请求


邮件系统中主机地址字符串的层次式表示

接收SMTP进程
与发送SMTP进程一起工作的进程。它等待通过传输服务建立的连接。它接收发送
SMTP发出的命令,给出应答并执行相应的操作

操作
一个信息由一个接收者发送到另一个或多个接收者的一系列操作