我有 2 个电子邮件服务器的简单设置。我的 Exchange 2010 服务器 MS2010 设置为将其收到的所有电子邮件转发到日志邮箱。日志邮箱位于我的 Exchange 2007 服务器 MS2007 上。最近几天（自从我一直在关注以来），我有 2 条消息无法被 MS2007 上的日志邮箱接收。以下是传输失败的接收连接器日志 -
2011-10-04T19:45:04.567Z,MS2007\From MS2010,08CE226DD039B679,46,192.168.1.11:25,192.168.1.38:20523,>,250 2.1.0 Sender OK,
2011-10-04T19:45:04.567Z,MS2007\From MS2010,08CE226DD039B679,47,192.168.1.11:25,192.168.1.38:20523,<,RCPT TO:<[email protected]> ORCPT=rfc822;[email protected],
2011-10-04T19:45:04.567Z,MS2007\From MS2010,08CE226DD039B679,48,192.168.1.11:25,192.168.1.38:20523,>,250 2.1.5 Recipient OK,
2011-10-04T19:45:04.567Z,MS2007\From MS2010,08CE226DD039B679,49,192.168.1.11:25,192.168.1.38:20523,<,BDAT 22080 LAST,
2011-10-04T19:45:04.676Z,MS2007\From MS2010,08CE226DD039B679,50,192.168.1.11:25,192.168.1.38:20523,>,550 5.7.1 Requested action not taken: message refused,
2011-10-04T19:45:04.676Z,MS2007\From MS2010,08CE226DD039B679,51,192.168.1.11:25,192.168.1.38:20523,-,,Local
为了进行比较，我剪辑了成功传递日志消息的传输对话 -
2011-10-04T19:45:51.707Z,MS2007\From MS2010,08CE226DD039B67C,53,192.168.1.11:25,192.168.1.38:20532,>,250 2.1.0 Sender OK,
2011-10-04T19:45:51.707Z,MS2007\From MS2010,08CE226DD039B67C,54,192.168.1.11:25,192.168.1.38:20532,<,RCPT TO:<[email protected]> ORCPT=rfc822;[email protected],
2011-10-04T19:45:51.707Z,MS2007\From MS2010,08CE226DD039B67C,55,192.168.1.11:25,192.168.1.38:20532,>,250 2.1.5 Recipient OK,
2011-10-04T19:45:51.707Z,MS2007\From MS2010,08CE226DD039B67C,56,192.168.1.11:25,192.168.1.38:20532,<,BDAT 60301 LAST,
2011-10-04T19:45:52.160Z,MS2007\From MS2010,08CE226DD039B67C,57,192.168.1.11:25,192.168.1.38:20532,>,250 2.6.0 <[email protected]> Queued mail for delivery,
2011-10-04T19:45:52.176Z,MS2007\From MS2010,08CE226DD039B67C,58,192.168.1.11:25,192.168.1.38:20532,<,QUIT,
2011-10-04T19:45:52.176Z,MS2007\From MS2010,08CE226DD039B67C,59,192.168.1.11:25,192.168.1.38:20532,>,221 2.0.0 Service closing transmission channel,
2011-10-04T19:45:52.176Z,MS2007\From MS2010,08CE226DD039B67C,60,192.168.1.11:25,192.168.1.38:20532,-,,Local
550 5.7.1 Requested action not taken: message refused,在这种情况下，可能是什么原因造成的？我应该去哪里查找？