我也有同样的问题，管理员邮箱中常收到This is a multipart message in MIME format.的邮件。
The attached message doesn't contain any addresses that can survive
the current parsing configuration.
From: lpgao@abc.konicaminolta.cn
Subject: =?gb2312?B?w7vHrrXEyrG68rrN09DHrrXEyrG68g==?=
[First few non-blank message lines]
This is a multipart message in MIME format.
--=_alternative 00084E0448257274_=
Content-Type: text/plain; charset="gb2312"
Content-Transfer-Encoding: base64
[End]
None of the addresses extracted from the headers within this message
match any address known to this server. You should inspect the headers
of the attached message and make sure that there is a local address
specified in at least one of them. If there is make sure you have setup
MDaemon to parse that header.
: 邮件包含[1]个附件作者: david_zh 时间: 2007-2-2 16:28 标题: 已解決. 我用的是8.15版本.經查論壇之前的資料,問題原因見: http://bbs.5dmail.net/thread-161523-1-8.html
解決辦法見: http://www.5dmail.net/bbs/thread-58853.html
將"Existing content"區域的"IFRAME *****"前面的勾去掉即可.作者: david_zh 时间: 2007-2-2 16:36
補充一點,我的退信主旨為:Message contains a IFRAME tag.
內容為:
A message with an html IFRAME tag has been detected!
The message has been moved to the bad message queue for further examination by you.
日志內容和各位所列大致相同.而且是個別人員出現此現象.不是全體使用者如此.