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利用telnet进行SMTP的验证

先计算BASE64编码的用户名密码,认证登录需要用到:

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**fify@fify-Vostro-3902:~$ perl -MMIME::Base64 -e 'print encode_base64("wangjingfei");'**
d2FuZ2ppbmdmZWk=
**fify@fify-Vostro-3902:~$ perl -MMIME::Base64 -e 'print encode_base64("fakepassword");'**
ZmFrZXBhc3N3b3Jk

开始登录并使用SMTP发送邮件:

fify@fify-Vostro-3902:~$ telnet smtp.163.com 25
Trying 123.125.50.133…
Connected to smtp.163.com.
Escape character is ‘^]’.
220 163.com Anti-spam GT for Coremail System (163com[20141201])
EHLO smtp.163.com # 开始连接前握手
250-mail
250-PIPELINING
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-coremail 1Uxr2xKj7kG0xkI17xGrU7I0s8FY2U3Uj8Cz28x1UUUUU7Ic2I0Y2UFCvVepUCa0xDrUUUUj
250-STARTTLS
250 8BITMIME
AUTH LOGIN # 开始登录,使用LOGIN方式
334 dXNlcm5hbWU6
d2FuZ2ppbmdmZWk= # 用户名的Base64
334 UGFzc3dvcmQ6
ZmFrZXBhc3N3b3Jk # 密码的Base64
235 Authentication successful
MAIL FROM: <wangjingfei@163.com> # 发件箱地址
250 Mail OK
RCPT TO: <wangjingfei@263.com> # 收件箱地址
250 Mail OK
DATA # 开始编写邮件正文
354 End data with <CR><LF>.<CR><LF>
TO: obama@whitehouse.com # 这里的数据可以随便写
FROM: xijinping@zhongnanhai.com # 这里也是
SUBJECT: A very important conference.

Please note that!

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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.



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原文地址:https://www.xiaotanzhu.com/%E5%85%B6%E4%BB%96/2016-06-15-login-smtp-with-telnet.html