Spam detection software, running on the system "mx.iis.sinica.edu.tw", has
identified this incoming email as possible spam.  The original message
has been attached to this so you can view it (if it isn't spam) or label
similar future email.  If you have any questions, see
The administrator of that system for details.

Content preview:  [...] 

Content analysis details:   (7.9 points, 6.9 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 1.4 FSL_HELO_BARE_IP_1     FSL_HELO_BARE_IP_1
 0.0 TVD_RCVD_IP4           TVD_RCVD_IP4
 0.0 TVD_RCVD_IP            TVD_RCVD_IP
 0.9 RCVD_NUMERIC_HELO      Received: contains an IP address used for HELO
 0.0 MIME_HTML_MOSTLY       BODY: Multipart message mostly text/html MIME
 0.0 HTML_MESSAGE           BODY: HTML included in message
 0.7 MPART_ALT_DIFF         BODY: HTML and text parts are different
 2.0 HTML_IMAGE_ONLY_04     BODY: HTML: images with 0-400 bytes of words
 0.0 PART_CID_STOCK         Has a spammy image attachment (by Content-ID)
 1.3 DC_GIF_UNO_LARGO       Message contains a single large inline gif
 1.3 RDNS_NONE              Delivered to internal network by a host with no rDNS
 0.0 STOCK_IMG_HTML         Stock spam image part, with distinctive HTML
 0.0 STOCK_IMG_HDR_FROM     Stock spam image part, with distinctive From line
 0.1 DC_IMAGE_SPAM_TEXT     Possible Image-only spam with little text
 0.1 DC_IMAGE_SPAM_HTML     Possible Image-only spam