space dot space com messages

[Kenneth Porter]

I'm seeing a lot of these spammed to my Mailman mailing lists. They 
generally consist of a single line with an obfuscated URL and a couple of 
blank lines. The URL looks like "abcde . com" (ie. a space on either side 
of the dot).

Does anyone have a rule to score these? I don't have Bayes at the MTA 
level, just at the delivery level, and since this is a list, there's no 
local recipient to score for.