Email服务器解析：为什么 [e-mail] 能收到信，而 [e-mail] 收不到信？

[zhangking]

把 snnu.net 和 why100000.com 的 MX 记录都解析到 同一个 IP 地址（参见以下nslookup 的测试结果）。Email Server 是 MS-Exchange Server2000。在活动目录里加入用户，自动建立了邮箱 [e-mail]。 后来把 why100000.com 的 MX 记录也指向了该 Email server，但是 [e-mail] 不能收到信。退回的信内容是：

This is the Postfix program at host smtp.263.net.

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the message returned below.

The Postfix program

<[e-mail]>: host why100000.com[202.117.148.135] said: 550 5.7.1
Unable to relay for [e-mail]

Reporting-MTA: dns; smtp.263.net
Arrival-Date: Wed, 22 Oct 2003 19:02:44 +0800 (CST)
X-Virus: 6

Final-Recipient: rfc822; [e-mail]
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host why100000.com[202.117.148.135] said: 550 5.7.1
Unable to relay for [e-mail]

------------------------------------------------------------
From: "张庆" <[e-mail]>
To: "zhangking" <[e-mail]>
Subject: ce shi
Date: Wed22 Oct 2003 19:02:43 +0800

zhangking，您好！
测试
　　　　致
礼！
　　　　　　张庆
　　　　[e-mail]
　　　　　2003-10-22
------------------------------------------------------------

Nslookup 的测试结果：

> set type=mx
> snnu.net
Server: dns.snnu.edu.cn
Address: 202.117.144.2

snnu.net MX preference = 10, mail exchanger = snnu.net
snnu.net nameserver = ns3.xaonline.com
snnu.net nameserver = ns2.xaonline.com
snnu.net internet address = 202.117.148.135
ns2.xaonline.com internet address = 61.134.3.11
ns3.xaonline.com internet address = 61.134.1.9
> why100000.com
Server: dns.snnu.edu.cn
Address: 202.117.144.2

why100000.com MX preference = 5, mail exchanger = why100000.com
why100000.com nameserver = dns.bizcn.com
why100000.com internet address = 202.117.148.135
dns.bizcn.com internet address = 218.5.77.19
>

[1917584]

邮件服务器的域名绑定的是snnu.net,why100000它可能不认。

可惜我使用的邮件服务器和你不一样，也说不明白。

[zhangking]

是不是就是一个 Email 服务器设置 2 个域名邮箱的问题？？

[flping]

没有在用MS-Exchange Server2000，帮你UP，感觉会不会是exchange中可不可以设多个域名？

[zhangking]

找了篇文章，说的是可以在 Exchang Server 2000 中设置 2 个域名的邮箱。

[zhangking]

http://www.csdn.net/Develop/Article/21/21866.shtm
按照以上文章，我的问题基本解决了！！！