今天头天开课,上午无事,试了试这个..跟人家学的
     打开cmd窗口
     ======================开始SMTP发信操作==========================

 telnet smtp.163.com 25              //telnet登录端口25,服务器是163的
正在连接到smtp.163.com.
220 163.com Anti-spam GT for Coremail System (163com[20050206])
ehlo smtp.163.com                                                           //握手
250-mail
250-PIPELINING
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250 8BITMIME
auth login                                                                   //认证登录
334 dXNlcm5hbWU6
id                                                                       //输入用户名
334 UGFzc3dvcmQ6
password                                                     //输入密码
535 Error: authentication failed                                       //直接用户名密码不能登录
auth login                                                           //again
334 dXNlcm5hbWU6
*********                                                       //用户名的base64编码
334 UGFzc3dvcmQ6
*********                                                        //密码的base64编码
235 Authentication successful                                      //登陆成功
MAIL FROM:<test@163.com>                                     // 邮件发送方
553 You are not authorized to send mail, authentication is required          // 不可伪造发送邮件 
MAIL FROM:<id@163.com>                            // 邮件发送方
250 Mail OK
RCPT TO:<id2@163.com>                                   //邮件的接收方，若有多个收件人，则重复这一语句多次。
250 Mail OK
DATA                                                                               //邮件体内容
354 Please start mail input.
TO: id1@163.com                                //此处的TO，FROM，等内容，可以随便造假 :)  可以骗人但骗不了懂得查看邮件源码的。
FROM: id2@163.com
SUBJECT:telent  smtp

helloworld                                            // 邮件正文内容，与Header部分空一行开始写
.                                                                       //邮件写完，以一个句点加回车结果。
250 Mail OK queued as smtp10,wKjADQ2ApxRnnqBE0CWaEw==.38326S3                 # 返回250 表示发送成功。
noop                                                          // 空语句，不执行任何操作，一般用来保持和服务器连接，不要掉线
250 OK
quit                                                            // 退出
221 Closing connection. Good bye.
Connection closed by foreign host.



======================开始POP3收信操作==========================

telnet pop.163.com 110                //telnet登录端口110,pop服务器pop.163.com
正在连接到pop.163.com...
+OK Welcome to coremail Mail Pop3 Server (163com[20050206])
user ivanfan2000                                                    //输入用户名
+OK core mail
pass *******                                             //输入密码
-ERR Command not valid in this state  //密码错误
user ivanfan2000
+OK core mail
pass *************
+OK 479 message(s) [160969000 byte(s)]
stat                                                                     // 查看邮箱状态
+OK 479 160969000
list                                                                         // 邮件列表
+OK 479 160969000
1 4799
2 27926
.......
478 5251
479 707505

top 478  0                                                    // 查看指定邮件的邮件头，478为指定邮件0表示查看整个邮件头，其它正整数表示限制返回多少行。
+OK core mail

Received: from globase2-5.facility.dir.dk (unknown [193.201.39.168])
        by mx22 (Coremail) with SMTP id wKjR3mBAwwlUOzpEaIsACQ==.37902S2;
        Mon, 10 Apr 2006 19:02:44 +0800 (CST)
Reply-To: "Bang & Olufsen" <beoinfo@bang-olufsen.dk>
From: "Bang & Olufsen" <beoinfo@bang-olufsen.dk>
To: "Ivan Fan" <ivanfan2000@163.com>
Subject: Reconnect and win a Bang & Olufsen Earset 1 Mobile
MIME-Version: 1.0
Content-type: text/html; charset="iso-8859-1"
Message-Id: <20060410105006.A3A066621F5@globase2-5.facility.dir.dk>
Date: Mon, 10 Apr 2006 12:50:06 +0200 (CEST)
Sender: 55309378@bounces.globase.com