内核邮件列表，发不了邮件是怎么回事啊？

向[email protected]发邮件，gmail给我回如下信息：
是怎么回事啊？？


发件人        Mail Delivery Subsystem <[email protected]>
发送至        [email protected]
日期        2010年10月7日 下午4:41
主题        Delivery Status Notification (Failure)
隐藏详细信息 16:41 (9 分钟前)
Delivery to the following recipient failed permanently:

    [email protected]

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.7.1 Content-Policy reject msg: The message contains HTML subpart, therefore we consider it SPAM or Outlook Virus.  TEXT/PLAIN is accepted.! BF:<H 0>; S1760180Ab0JGIlF (state 1.

----- Original message -----

MIME-Version: 1.0
Received: by 10.227.128.19 with SMTP id i19mr452471wbs.104.1286440863172; Thu,
07 Oct 2010 01:41:03 -0700 (PDT)
Received: by 10.227.127.143 with HTTP; Thu, 7 Oct 2010 01:41:03 -0700 (PDT)
Date: Thu, 7 Oct 2010 16:41:03 +0800
Message-ID: <[email protected]>
Subject: problems on my modified schedule()
From: changshou li <[email protected]>
To: [email protected]
Content-Type: multipart/mixed; boundary=0016367fa532ac9450049202da05
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