Exchange 2013 无法发往QQ邮箱

新搭建的exchange 2013,收邮件，目前一切正常，发邮件有的正常，比如hotmail、163，然后现在问题很大的就是发往QQ邮箱不行，21cn也是报同样的错误，求大神帮忙下。
下面是发邮件的超时收到的日志。

供管理员使用的诊断信息:
生成服务器: mailserver2.XX.COM
接收服务器: qq.com (240e:ff:f040:28::f)
3470418@qq.com
Remote Server at qq.com (240e:ff:f040:28::f) returned '400 4.4.7 Message delayed'
2016/3/20 18:23:10 - Remote Server at qq.com (240e:ff:f040:28::f) returned '441 4.4.1 Error encountered while communicating with primary target IP address: "Failed to connect. Winsock error code: 10051, Win32 error code: 10051." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts. The last endpoint attempted was 240e:ff:f040:28::f:25'
原始邮件头:

Received: from mailserver2.XX.COM (192.168.8.4) by mailserver2.XX.com
(192.168.8.4) with Microsoft SMTP Server (TLS) id 15.0.1156.6; Sun, 20 Mar
2016 22:28:16 +0800
Received: from mailserver2.XX.COM ([fe80::ac0c:b9e5:a0dc:c281]) by
mailserver2.XX.com ([fe80::ac0c:b9e5:a0dc:c281%13]) with mapi id
15.00.1156.000; Sun, 20 Mar 2016 22:28:16 +0800
From: Exchangeadmin <Exchangeadmin@XX.com.cn>
To: =?gb2312?B?qWGpZb+tzsSjqg==?= <3470418@qq.com>
Subject: =?gb2312?B?tPC4tDogdGVzdA==?=
Thread-Topic: test
Thread-Index: AQHRgrSwyChwdyCuYUGvMhNEMJgk759iZAke
Date: Sun, 20 Mar 2016 14:28:16 +0000
Message-ID: <1458484282790.58779@XX.com.cn>
References: <tencent_7B271F391BBB279D57FCE02F@qq.com>
In-Reply-To: <tencent_7B271F391BBB279D57FCE02F@qq.com>
Accept-Language: zh-CN, en-US
Content-Language: zh-CN
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [1.1.1.1]
x-esetresult: clean, is OK
x-esetid: 37303A29ED47DC6064746B
Content-Type: multipart/alternative;
      boundary="_000_145848428279058779XXcomcn_"
MIME-Version: 1.0