服务器一下就不正常了，请看日志：
Session 1877; child 3
Wed 2008-04-23 00:45:07: Parsing Message <c:\mdaemon\queues\remote\retry\pd90000018380.msg>
Wed 2008-04-23 00:45:07: From: Lisa.lee@thtf.com.hk
Wed 2008-04-23 00:45:07: To: james.kong@tfth.com.hk
Wed 2008-04-23 00:45:07: Subject: =?gb2312?B?UmU6IDUuMDHHsNKqvbu1xLv1LMfrvqG/7Mi3yM/GwbXE0MXPoi68sSE=?=
Wed 2008-04-23 00:45:07: Message-ID: <004301c8a424$7a025410$6c01a8c0@lltf>
Wed 2008-04-23 00:45:07: MX-record resolution of [tfth.com.hk] in progress (DNS Server: 202.96.134.133)...
Wed 2008-04-23 00:45:07: Name server reports domain name unknown
Wed 2008-04-23 00:45:07: Attempting SMTP connection to [tfth.com.hk : 25]
Wed 2008-04-23 00:45:07: A-record resolution of [tfth.com.hk] in progress (DNS Server: 202.96.134.133)...
Wed 2008-04-23 00:45:07: Name server reports domain name unknown
Wed 2008-04-23 00:45:07: This message is 0 days old; it has 1 days left to get delivered
Wed 2008-04-23 00:45:07: SMTP session terminated (Bytes in/out: 0/0)

现在是只能发外部，发内部和接收都不行。还请大家指点一下！谢谢！

换个DNS SERVER地址试试。