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Exchange 2010 - 无法发送到特定域 - 由于套接字错误导致 421 连接断开

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Exchange 2010 - 无法发送到特定域 - 由于套接字错误导致 421 连接断开

我查看了一些现有的 SF 问题/答案，到目前为止找不到相同的情况。这不是我最初认为的 TLS 问题，因为远程服务器没有要求 TLS，也不是防火墙问题，因为连接已建立并开始发送和接收 SMTP 命令。

我们在 Exchange 队列中针对一个域获取了以下内容：

交换队列

远程域似乎是 Exchange 2003 服务器。

以下是该电子邮件的 SMTP 日志的副本：

2013-04-12T19:03:20.684Z,Internet,08D004A55169DB35,0,,XX.XX.XX.XX:25,*,,attempting to connect
2013-04-12T19:03:20.731Z,Internet,08D004A55169DB35,1,10.54.2.15:25977,XX.XX.XX.XX:25,+,,
2013-04-12T19:03:20.777Z,Internet,08D004A55169DB35,2,10.54.2.15:25977,XX.XX.XX.XX:25,<,"220 plexch2k3.REMOTE.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at  Fri, 12 Apr 2013 15:03:20 -0400 ",
2013-04-12T19:03:20.777Z,Internet,08D004A55169DB35,3,10.54.2.15:25977,XX.XX.XX.XX:25,>,EHLO exchange.OURDOMAIN.com,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,4,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-plexch2k3.REMOTE.com Hello [6X.XX.X.70],
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,5,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-TURN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,6,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-SIZE,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,7,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-ETRN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,8,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-PIPELINING,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,9,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-DSN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,10,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-ENHANCEDSTATUSCODES,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,11,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-8bitmime,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,12,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-BINARYMIME,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,13,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-CHUNKING,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,14,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-VRFY,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,15,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-X-EXPS GSSAPI NTLM LOGIN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,16,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-X-EXPS=LOGIN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,17,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-AUTH GSSAPI NTLM LOGIN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,18,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-AUTH=LOGIN,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,19,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-X-LINK2STATE,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,20,10.54.2.15:25977,XX.XX.XX.XX:25,<,250-XEXCH50,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,21,10.54.2.15:25977,XX.XX.XX.XX:25,<,250 OK,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,22,10.54.2.15:25977,XX.XX.XX.XX:25,*,5945,sending message
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,23,10.54.2.15:25977,XX.XX.XX.XX:25,>,MAIL FROM:<[email protected]> SIZE=13577,
2013-04-12T19:03:20.824Z,Internet,08D004A55169DB35,24,10.54.2.15:25977,XX.XX.XX.XX:25,>,RCPT TO:<[email protected]>,
2013-04-12T19:03:20.871Z,Internet,08D004A55169DB35,25,10.54.2.15:25977,XX.XX.XX.XX:25,<,250 2.1.0 [email protected] OK,
2013-04-12T19:03:20.949Z,Internet,08D004A55169DB35,26,10.54.2.15:25977,XX.XX.XX.XX:25,-,,Remote

我似乎无法弄清楚问题是什么。看来问题可能出在远程端，如下所示：

250 2.1.0 [email protected] OK,

然后它说：

,,Remote

无论这意味着什么，那便是该日志和连接的结束。

关于如何解决这个问题有什么想法吗？

答案1

plexch2k3.parkerlabs.com 在拒绝后立即关闭 TCP 会话RCPT TO:。它似乎“混淆”了您的 MTA。

我的测试 telnet 连接产生了：
550 5.7.1 Your email messages have been blocked by the recipient OR by Trend Micro Email Reputation Service. Contact the recipient or his/her administrator using alternate means to resolve the issue.
Connection closed by foreign host.

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