Spam detection software, running on the system "sv.labornetjp.org", 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:  さんぎいん [...] 

Content analysis details:   (6.5 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 0.2 NO_REAL_NAME           From: does not include a real name
-0.1 ISO2022JP_BODY         BODY: ISO-2022-JP message
 0.7 HTML_SHORT_LENGTH      BODY: HTML is extremely short
 0.3 MIME_HTML_MOSTLY       BODY: Multipart message mostly text/html MIME
 0.0 HTML_MESSAGE           BODY: HTML included in message
 1.5 MPART_ALT_DIFF         BODY: HTML and text parts are different
 3.1 HTML_IMAGE_ONLY_04     BODY: HTML: images with 0-400 bytes of words
 0.4 DNS_FROM_RFC_ABUSE     RBL: Envelope sender in abuse.rfc-ignorant.org
 0.4 HTML_SHORT_CENTER      HTML is very short with CENTER tag

The original message was not completely plain text, and may be unsafe to
open with some email clients; in particular, it may contain a virus,
or confirm that your address can receive spam.  If you wish to view
it, it may be safer to save it to a file and open it with an editor.