Blocking specific email addresses

[Joe Lewis Wilkins]

Hi all,

I'm desperate. For the past two weeks I have been receiving nearly 500  
spam email messages from a single address every day. My ISP is Cox and  
they can't help me because I use Macs. They are currently sent to my  
trash, but I don't even want to deal with them at all. Anyone know how  
to block a specific email address so that it doesn't even show up  
anywhere? I'm using Apple's Mail on an Intel Mac with Leopard.

Thanks loads,

Joe Wilkins