今天閒著無聊,telnet上 Google 的smtp郵件伺服器看了看。 結果 EHLO 之後就什麽命令都用不了了,打個 HELP 都不支持....還有人去過嗎?討論討論。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 也不是啊,yahoo就可以嗎。也不見得人家有多危險。不過不知道 Google用的什麽 MTA, 難道是他們自己寫的也不好說。 测试如下:D:\tool>nc 216.239.37.25 25220 smtp.google.com ESMTPhelp214 2.0.0 End of HELP infohelo hotmail.com250 smtp.google.com Hello [20*.**.**.***], pleased to meet youmail from:[email protected]250 2.1.0 [email protected]... Sender okrcpt to:[email protected]550 5.7.1 [email protected]... Relaying denied. IP name lookup failed [20*.**.**.***],rcpt to:[email protected]553 5.5.3 [email protected]... Invalidquit221 Closing connection. Good bye.......对吗? 呵呵,Google的smtp 伺服器有好幾個呢...smtp.google.com canonical name = smtp3.google.comsmtp3.google.com MX preference = 20, mail exchanger = smtp1.google.comsmtp3.google.com MX preference = 40, mail exchanger = smtp2.google.comsmtp3.google.com MX preference = 10, mail exchanger = smtp3.google.comgoogle.com nameserver = ns1.google.comgoogle.com nameserver = ns2.google.comgoogle.com nameserver = ns3.google.comgoogle.com nameserver = ns4.google.comsmtp1.google.com internet address = 216.239.57.25smtp2.google.com internet address = 216.239.37.25smtp3.google.com internet address = 216.239.57.26ns1.google.com internet address = 216.239.32.10ns2.google.com internet address = 216.239.34.10ns3.google.com internet address = 216.239.36.10ns4.google.com internet address = 216.239.38.10 能 ping 通嗎?用XP的 nslookup 試試如何 MFC 点击插入按钮将文本框的值插入到listcontrol中,可是并没有看到效果 串口通信 网络编程高手请帮助 急求,怎样读取YUV420每一帧的信息 MFC的单文档界面的打开菜单问题 map在vc6/stlport里的编译问题 关于CTreeCtrl类中获得一个Item的子项 如何改变INSTALLSHIELD 安装程序的标题 MFC如何实现键值对 ShellExecute打开文本文件遇到的问题 这个结构应该如何写呀?结构见内容 怎么让关于数据库的程序自动注册DSN
不過不知道 Google用的什麽 MTA, 難道是他們自己寫的也不好說。
D:\tool>nc 216.239.37.25 25
220 smtp.google.com ESMTP
help
214 2.0.0 End of HELP info
helo hotmail.com
250 smtp.google.com Hello [20*.**.**.***], pleased to meet you
mail from:[email protected]
250 2.1.0 [email protected]... Sender ok
rcpt to:[email protected]
550 5.7.1 [email protected]... Relaying denied. IP name lookup failed [20*.**.**.***],
rcpt to:[email protected]
553 5.5.3 [email protected]... Invalid
quit
221 Closing connection. Good bye.
......
对吗?
smtp3.google.com MX preference = 20, mail exchanger = smtp1.google.com
smtp3.google.com MX preference = 40, mail exchanger = smtp2.google.com
smtp3.google.com MX preference = 10, mail exchanger = smtp3.google.comgoogle.com nameserver = ns1.google.com
google.com nameserver = ns2.google.com
google.com nameserver = ns3.google.com
google.com nameserver = ns4.google.com
smtp1.google.com internet address = 216.239.57.25
smtp2.google.com internet address = 216.239.37.25
smtp3.google.com internet address = 216.239.57.26
ns1.google.com internet address = 216.239.32.10
ns2.google.com internet address = 216.239.34.10
ns3.google.com internet address = 216.239.36.10
ns4.google.com internet address = 216.239.38.10
用XP的 nslookup 試試如何