Span in Yahoo Email

Is there any way to stop spam from comming into my Yahoo email box? I'm getting about 15 per day and increasing.
This is what it looks like:
Sat, August 14, 2010 10:05:52 AMHaveYourPrescriptionsAtDiscountsWhenYouShopOnline
From: Theresa Little <littletheresa78@hotmail.com> Add to Contacts
To: h_statton@yahoo.co.uk  


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Matrin studeid Luarie a loeng moemnt, theen ndoded in
http://roccforpttr.com you'd everr beeen touhced by theit dakrness.'
compainons daied froum hugner and could, and two werre cpatured by a beind

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 From Theresa Little Sat Aug 14 15:05:52 2010
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From: Theresa Little <littletheresa78@hotmail.com>
To: <h_statton@yahoo.co.uk>
Subject: HaveYourPrescriptionsAtDiscountsWhenYouShopOnline
Date: Sat, 14 Aug 2010 15:05:52 +0000
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