IMAP search headers

From: rob <rob.merritt_at_no.spam.please>
Date: Tue Nov 27 2007 - 11:58:47 CST

is there anyway to search the received headers for any occurance other
than (CST) or -600 ie this one shhou8ld trigger a found result

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I was trying to use the message filters in Evolution but I can figure
out how to run them on preexisting email
Received on Tue Nov 27 12:05:09 2007

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