Way to search mail headers?

I want to search the headers of messages for "X-Text-Classification: 
spam" so I can group and manually discard all my POPFile-identified 
spam. Is there a way to do this?

The reason I do not have POPFile (my spam identification application) 
delete the messages is that I like to review them for false-positives in 
my normal email client. Plus, I save them in a "spam" folder forever. 
But I don't want to have them in Zoe.

Thanks!

-e.


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