Test and Keep spam

[Kenneth Porter]

I got a flurry of these this morning, and they keep coming back. Has anyone 
come up with some good rules for these? Obviously both "test" and "keep" in 
the subject line. What else? The overall HTML structure looks pretty 
consistent, so perhaps something that matches on that pattern? I'm seeing a 
table that starts with a bunch of images and then a final paragraph. All 
the internal links have tracking numbers, but the numbers have some 
variation within a message. This might be a good candidate for a plugin.