Received "bonus notice" supposedly from Yahoo! Believe this is a scam. How do I report it?

Informed that I have won Eight Hundred and Twnet Thousand dollars (USD) for the 2013 MID-YEAR Lucky E-Mail Promotion, organized by Yahoo & MSN WINDOWS LIVE AWARDS. Letter further states the following: BATCH NUMBER: MFI/06/APA-43658 REFERENCE NUMBER; 2008234522 WINNING NUMBER; 14, 21, 30, 34, 47, 71 PIN:... show more Informed that I have won Eight Hundred and Twnet Thousand dollars (USD) for the 2013 MID-YEAR Lucky E-Mail Promotion, organized by Yahoo & MSN WINDOWS LIVE AWARDS.
Letter further states the following: BATCH NUMBER: MFI/06/APA-43658
REFERENCE NUMBER; 2008234522
WINNING NUMBER; 14, 21, 30, 34, 47, 71
PIN: 1206
The letter lists fiduciary agent as Mr. Richard Dickson, with two email addresses: richarddickson52@hotmail.co.za and richarddickson54@yahoo.co.za with a telephone number of
Tel: +277 81 692 319. The letter asks for my full name, country, address, phone and mobile phone number, sex, D.O.B., marital status and profession.
The letter is signed Mrs. Linda Naidoo, Online Coordinator, Yahoo-MSN Award.
Has this bogus letter been send by email to anyone else???

Please inform me ASAP about what can be done to prevent these letters from coming to my email.
thank you.
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