[martin_fierro]

If "Sparklist.com" is the culprit, you can contact 'em here:

SparkLIST.com Corporation (SPARKLIST-DOM)
1800 West Mason Street
Green Bay, WI 54303
US

Domain Name: SPARKLIST.COM

Administrative Contact, Technical Contact:
SparkLIST Domains Registrar (MQNOFTEIDO) domains@SPARKLIST.COM
SparkLIST.com Corporation
1800 West Mason Street
Green Bay, WI 54303
USA
920.366.3528
Fax- 920.490.5909

Record expires on 11-Aug-2003.
Record created on 12-Aug-1997.
Database last updated on 1-Jul-2002 16:01:52 EDT.

Domain servers in listed order:

NS1.SPARKLIST.COM 207.67.22.84
NS2.SPARKLIST.COM 207.67.22.85

You can also contact your's state's AG's office if it has anti-SPAM legislation in place.