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终于解决不能发送邮件到sohu


公司添置一批新服务器到汕头电信机房,我搭建了一台qmail邮件服务器。后来测试发现不能发送邮件到sohu,但可以收到sohu的来信。qmail日志显示如下:
2007-03-06 13:26:07.476335500 starting delivery 16148: msg 146196 to remote cnfx8888@sohu.com
2007-03-06 13:26:07.476354500 status: local 0/10 remote 1/20
2007-03-06 13:26:07.482487500 delivery 16148: deferral: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/

telnet一下sohu的mx服务器,发现:
[root@web home]# date
Tue Mar  6 13:25:55 CST 2007

[root@web home]# host -t mx sohu.com
sohu.com mail is handled by 10 sohumx.h.a.sohu.com.

[root@web home]# telnet sohumx.h.a.sohu.com 25
Trying 61.135.132.100...
telnet: connect to address 61.135.132.100: Connection timed out
telnet: Unable to connect to remote host: Connection timed out
[root@web home]# 

根本不能连接它的25端口。试了其他10几台机器(同一个IP段内)都是一样。
开始比较忙,没时间去理,怀疑有可可能是电信机房的防火墙拦截了到sohu的25端口连接。但联系电信,,,你知道,他们应该效率比较低,也就没管了。
年后回来,这两天有点时间,就跟sohu沟通了一下,几天后问题解决,哈哈````高兴!!:yes:
原来是服务器所属IP段曾经发送大量flg反动邮件,故被封了`````晕吧``````:faint:

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下面是来往的邮件原文:

您好:
经工程师检查,贵公司IP:125.***.***.xxx-125.***.***.yyy 所属IP段去年发送过大量flg反动邮件,所以IP段被前端设备拒收
所以之前我们在系统中没有查到
现已解除封锁
稍后可测试

谢谢
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Linux下增加apache的mod_rewrite模块目前最全的网通和电信IP段

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