windows 2003 sp2+ exchange 2003 sp2
内网IP NAT到一个外网IP,对外开放25端口。
主机也加了MX记录。
可以收到外网邮件,但发送到外网的邮件刚总是被退回。
The following recipient(s) could not be reached:
username@126.com on 2008-9-22 13:18
Could not deliver the message in the time limit specified. Please retry or contact your administrator.
<14pek-msg02.abc.com #4.4.7>
在服务器手动连接126的smtp服务器失败,但是奇怪,同一网段的DNS server上却可以连接到126的smtp server.信息如下:
C:\Program Files\Support Tools>telnet smtp.126.com 25
Connecting To smtp.126.com...Could not open connection to the host, on port 25:
Connect failed
防火墙上:ex-->internet 开通25端口,internet-->MIP ex server的25端口开通所有服务,应该不是防火墙设定的问题吧?
如果是DNS问题,应该不能ping通smtp.126.com吧?可是在ex上却可以ping通,信息如下:
C:\Program Files\Support Tools>ping smtp.126.com
Pinging smtp.126.split.netease.com [202.108.5.142] with 32 bytes of data:
Reply from 202.108.5.142: bytes=32 time=1ms TTL=55