计算机网络-第2章 SMTP-同步电大进度

青旅半醒 2023-01-13 05:46 162阅读 0赞

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SMTP协议传输的三个阶段不包括(    )。

*  A.握手 (问候)
 *  B.传输邮件消息
 *  **C.回复邮件消息**
 *  D.结束

### SMTP客户和服务器的命令交互 ###

**本课中给出了SMTP客户和服务器的命令交互的基本流程。但在实际应用中，还涉及到登录认证等命令。试给出一个登录到某SMTP服务器并发送一封邮件的完整过程示例。**

SMTP示例：（以163邮箱为例，假设从aaa@163.com发送到bbb@qq.com)

先telnet到：smtp.163.com 25

helo llllll

//ss.uestc.edu.cn可替换为任意字符串，某些邮箱需要用 ehlo，而不是helo

auth login                           //注意，如今邮箱，如QQ，163等还需要独立授权码之类，需要用手机辅助来获取，在邮箱设置-开启SMTP/POP处有相关操作

//此处输入字符串"aaa@163.com"的base64编码

//此处输入aaa@163.com的密码的base64编码

mail from:<aaaa@163.com>

rcpt to:<bbb@qq.com> //此处可添加多个接收人邮箱地址——用多个rcpt to命令，每个一行

data          //敲入此命令后，下面输入的就是邮件内容

From: aaa@163.com //发件人

Reply-To: aaa@163.com //收件人

To: bbb@qq.com //如果多个接收人，这里就把他们邮箱地址写出，英文逗号分隔

Subject:just a test    //主题

//此处有个空行

we will rock you        // 此行和下面一行是邮件正文

\---------------------

. //此处 . 不可缺少，后面加个回车

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