Filter for message that have nothing but headers?

  How would I write a filter for mail that had nothing but headers, and 
no body text (from spambots that didn't get through Quality 
Assurance..)?  Something like:
* Status:[ \n\t]*

but that would only match if that were the *last* thing in the message? 
 And of course, it might not have a Status: header..
Jim


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