Empty mails (again)

["Adam D. Lopresto" <ad...@pubcrawler.org>]

I remember last week someone mentioned getting a flood of empty emails (no
subject, no body, no To: address) and was asking how to catch them.  I've been
wondering the same thing.  I understand that no body or no subject could easily
be OK (actually, I would suspect a message truly having no body to be a ham
sign--quick one line message written entirely in the subject), but a message
lacking either is surely devoid of (obvious) meaning.  (Actually, I keep
wanting to forward them to the Department of Homeland Security--clearly they
must be steganography, hiding the message in the timing and the forged From:
address.)  Using MISSING_DATE as a reference, I can check for an empty subject

header NO_SUBJECT Subject =~ /^UNSET$/ [if-unset: UNSET]

But what is the best way to check for a completely empty body?
-- 
Adam Lopresto
http://cec.wustl.edu/~adam/

You cannot grow a beard in a moment of passion.

--G.K. Chesterton