An aside – email with iframes

Hi guys,
This is a little aside from normal topic. Simply cos its only started since I fired up WP. I dont want to offend anyone OK.
Received a number of emails with an <iframe> in the content – Ok I get heaps of spam thro our main site – nothing new ?? So Ive been hunting for a list of spammer urls known to WP users – been looking tho some of the topics and found some – any pointers ?