MD7.1发送个别邮件出现问题

desert_fisher

xa.com 与xb.com都是公司租用万网邮件服务器的空间,xb.com邮件利用outlook进行收发，xa.com的邮件利用MDaemon7.1进行转发和收集到EXchange5.5中，现在用MD7.1邮件系统发送到xb.com出现问题,MD7.1 smtp出的日志如下：
Thu 2012-03-01 10:00:38: ----------
Thu 2012-03-01 10:04:10: Session 1239; child 1
Thu 2012-03-01 10:04:09: Parsing Message <d:\mdaemon\remoteq\pd50000462744.msg>
Thu 2012-03-01 10:04:09: From: chenzhiming@xiaokang.com
Thu 2012-03-01 10:04:09: To: moon.huang@thefountains.cn
Thu 2012-03-01 10:04:09: Subject: mail test
Thu 2012-03-01 10:04:09: Message-ID: <16CB9B88C8605943B12E23DBDF459B2D01670F54@svrerp2a.mccall.gz.gd.cn>
Thu 2012-03-01 10:04:09: [thefountains.cn]的 MX-record 解析已在进行(DNS 服务: 202.96.128.86)...
Thu 2012-03-01 10:04:09: P=010 D=thefountains.cn TTL=(60) MX=[mxw.mxhichina.com] {110.75.167.90}
Thu 2012-03-01 10:04:09: P=005 D=thefountains.cn TTL=(60) MX=[mxn.mxhichina.com] {110.75.167.79}
Thu 2012-03-01 10:04:09: Attempting MX: P=005 D=thefountains.cn TTL=(60) MX=[mxn.mxhichina.com] {110.75.167.79}
Thu 2012-03-01 10:04:09: 正在试图 SMTP 连接到 [110.75.167.79 : 25]
Thu 2012-03-01 10:04:09: 等候 socket 连接...
Thu 2012-03-01 10:04:09: Socket 连接建立(202.104.68.102 : 53556 -> 110.75.167.79 : 25)
Thu 2012-03-01 10:04:09: 等候协议初始化...
Thu 2012-03-01 10:04:10: <-- 220 mx1.aliyun-inc.com MX AliMail Server(127.0.0.1)
Thu 2012-03-01 10:04:10: --> EHLO xiaokang.com
Thu 2012-03-01 10:04:10: <-- 250-mx1.aliyun-inc.com
Thu 2012-03-01 10:04:10: <-- 250-8BITMIME
Thu 2012-03-01 10:04:10: <-- 250-AUTH=PLAIN LOGIN
Thu 2012-03-01 10:04:10: <-- 250-AUTH PLAIN LOGIN
Thu 2012-03-01 10:04:10: <-- 250-PIPELINING
Thu 2012-03-01 10:04:10: <-- 250 DSN
Thu 2012-03-01 10:04:10: --> MAIL From:<chenzhiming@xiaokang.com>
Thu 2012-03-01 10:04:10: <-- 502 Mailfrom account is a local account met at MTA chenzhiming@xiaokang.com
Thu 2012-03-01 10:04:10: --> QUIT
Thu 2012-03-01 10:04:10: Attempting MX: P=010 D=thefountains.cn TTL=(60) MX=[mxw.mxhichina.com] {110.75.167.90}
Thu 2012-03-01 10:04:10: 正在试图 SMTP 连接到 [110.75.167.90 : 25]
Thu 2012-03-01 10:04:10: 等候 socket 连接...
Thu 2012-03-01 10:04:10: Socket 连接建立(202.104.68.102 : 53557 -> 110.75.167.90 : 25)
Thu 2012-03-01 10:04:10: 等候协议初始化...
Thu 2012-03-01 10:04:10: <-- 220 mx1.aliyun-inc.com MX AliMail Server(127.0.0.1)
Thu 2012-03-01 10:04:10: --> EHLO xiaokang.com
Thu 2012-03-01 10:04:10: <-- 250-mx1.aliyun-inc.com
Thu 2012-03-01 10:04:10: <-- 250-8BITMIME
Thu 2012-03-01 10:04:10: <-- 250-AUTH=PLAIN LOGIN
Thu 2012-03-01 10:04:10: <-- 250-AUTH PLAIN LOGIN
Thu 2012-03-01 10:04:10: <-- 250-PIPELINING
Thu 2012-03-01 10:04:10: <-- 250 DSN
Thu 2012-03-01 10:04:10: --> MAIL From:<chenzhiming@xiaokang.com>
Thu 2012-03-01 10:04:10: <-- 502 Mailfrom account is a local account met at MTA chenzhiming@xiaokang.com
Thu 2012-03-01 10:04:10: --> QUIT
Thu 2012-03-01 10:04:10: 试图发送邮件到网关。