Spam detection software, running on the system "arwen.fcen.uba.ar", 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:  Felicitaciones!!! Ganate una Sony Cyber Shot W30!!! Si
  usted es mayor de 18 aņos de edad [...] 

Content analysis details:   (5.1 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 1.1 SPF_NEUTRAL            SPF: sender does not match SPF record (neutral)
[SPF failed: Please see http://www.openspf.org/why.html?sender=tuopinion.encuesta%40gmail.com&ip=200.80.190.25&receiver=arwen.fcen.uba.ar]
 0.1 HTML_90_100            BODY: Message is 90% to 100% HTML
 0.0 HTML_MESSAGE           BODY: HTML included in message
 0.0 BAYES_50               BODY: Bayesian spam probability is 40 to 60%
                            [score: 0.5000]
 0.0 MIME_HTML_ONLY         BODY: Message only has text/html MIME parts
 3.9 RCVD_IN_XBL            RBL: Received via a relay in Spamhaus XBL
                            [200.80.190.25 listed in sbl-xbl.spamhaus.org]

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.