telnet测试smtp发信

怎么通过telnet测试smtp发信：

测试SMTP认证：

 通过perl命令获得[email protected]的用户名和密码的base64编码：

 # perl -e 'use MIME::Base64; print encode_base64("postmaster\@extmail.org")'

 cG9zdG1hc3RlckBleHRtYWlsLm9yZw==

 # perl -e 'use MIME::Base64; print encode_base64("extmail")'

 ZXh0bWFpbA==

 # telnet mail.extmail.org 25

Trying 192.168.1.252...

Connected to mail.extmail.org (192.168.1.252).

Escape character is '^]'.

220 mail.extmail.org ESMTP Postfix -uplooking

ehlo mail.extmail.org   //手动输入的：

250-mail.extmail.org

250-PIPELINING

250-SIZE 5242880

250-VRFY

250-ETRN

250-AUTH PLAIN LOGIN

250-AUTH=PLAIN LOGIN

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

auth login  //手动输入的

334 VXNlcm5hbWU6

cG9zdG1hc3RlckBleHRtYWlsLm9yZw==    //手动复制

334 UGFzc3dvcmQ6

ZXh0bWFpbA==  //手动复制的

235 2.7.0 Authentication successful

mail from:[email protected] //输入内容，注意此处test的base64编码一定与上面的认证信息对应！！！

250 2.1.0 Ok

rcpt to:[email protected] //输入内容，要给谁发信

250 2.1.5 Ok

data  //输入内容

354 End data with <CR><LF>.<CR><LF>

subject: this is the subject //主题，标题信息在这个地方写

xian zai shi zheng wen //正文信息

jieshu.

.

250 2.0.0 Ok: queued as B817A4BBF63

quit

221 2.0.0 Bye

Connection closed by foreign host.