This mail is probably spam.  The original message has been attached
along with this report, so you can recognize or block similar unwanted
mail in future.  See http://spamassassin.org/tag/ for more details.

Content preview:  FUEL SAVER PRO This revolutionary device Boosts Gas
  Mileage 27%+ by helping fuel burn better using three patented processes
  from General Motors. Take a test drive Today -
  http://www.zppi.org/?axelI [...] 

Content analysis details:   (9.40 points, 5 required)
RATWARE_EGROUPS    (4.3 points)  Bulk email software fingerprint (eGroups) found in headers
FORGED_YAHOO_RCVD  (2.3 points)  'From' yahoo.com does not match 'Received' headers
RCVD_IN_NJABL      (0.9 points)  RBL: Received via a relay in dnsbl.njabl.org
                   [RBL check: found 181.117.160.67.dnsbl.njabl.org., type: 127.0.0.9]
RCVD_IN_RFCI       (1.4 points)  RBL: Received via a relay in ipwhois.rfc-ignorant.org
                   [RBL check: found 181.117.160.67.ipwhois.rfc-ignorant.org., type: 127.0.0.6]
RCVD_IN_UNCONFIRMED_DSBL (0.5 points)  RBL: Received via a relay in unconfirmed.dsbl.org
                   [RBL check: found 181.117.160.67.unconfirmed.dsbl.org.]

The original message did not contain 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.