sendmail邮件服务器 往某些地址发邮件 偶尔发不过去

chx203

最近往一个地址发邮件  间歇性发不出去  下面是一些log 大牛帮忙看一下。。

root@ncs12prd1 # sendmail -v -qRovt.com

Running /var/spool/mqueue/q865VdLm010480 (sequence 1 of 2)
<xxx@ovt.com>... Connecting to mail.ovt.com. via esmtp...
220 ovthub-node1.ovt.com Microsoft ESMTP MAIL Service ready at Sun, 9 Sep 2012 1
9:07:44 -0700
>>> EHLO ncs12prd1.wxics.com
250-ovthub-node1.ovt.com
250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250 XRDST
>>> STARTTLS
220 2.0.0 SMTP server ready
>>> EHLO ncs12prd1.wxics.com
250-ovthub-node1.ovt.com Hello [10.0.0.163]
250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-AUTH NTLM LOGIN
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250 XRDST
>>> MAIL From:<xxx@wxics.com> SIZE=587211
250 2.1.0 Sender OK
>>> RCPT To:<xxx@ovt.com>
>>> DATA
250 2.1.5 Recipient OK
354 Start mail input; end with <CRLF>.<CRLF>
semicro-tech.com': Name server timeout
semicro-tech.com': Name server timeout
timeout writing message to mail.ovt.com.: Broken pipe
<xxx@ovt.com>... Deferred

Running /var/spool/mqueue/q858VQJS027425 (sequence 2 of 2)
<xxx1@ovt.com>,<xxx2@ovt.com>,<xxx3@ovt.com>,<xxx4@ovt.com>.
.. Deferred: Broken pipe
Closing connection to mail.ovt.com.