公司配置禅道邮件时，部分邮件发送不成功

公司是用的exchange服务器，使用域进行管理，在配置禅道发信后，会出现部分邮件发送失败的情况；

问题随机出现，不是特定的发件人和收件人；与邮件内容无关，与附件无关，只发一个有标题的邮件，也可能失败；

所有出错信息一致

错误信息如下：

SMTP 错误：数据不被接受。<br />SMTP -> FROM SERVER:220 EX2010-CAH03.rd.com Microsoft ESMTP MAIL Service ready at Tue, 9 Aug 2016 14:41:45 +0800
<br />SMTP -> FROM SERVER: 250-EX2010-CAH03.rd.com Hello [10.17.1.124]
250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM LOGIN
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250-XRDST
250 XSHADOW
<br />SMTP -> FROM SERVER:250 2.1.0 Sender OK
<br />SMTP -> FROM SERVER:250 2.1.5 Recipient OK
<br />SMTP -> FROM SERVER:250 2.1.5 Recipient OK
<br />SMTP -> FROM SERVER:250 2.1.5 Recipient OK
<br />SMTP -> FROM SERVER:250 2.1.5 Recipient OK
<br />SMTP -> FROM SERVER:250 2.1.5 Recipient OK
<br />SMTP -> FROM SERVER:354 Start mail input; end with <CRLF>.<CRLF>
<br />SMTP -> FROM SERVER:
<br />SMTP -> ERROR: DATA not accepted from server: 
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