[exim] DKIM debugging

Hi!

I have found a bunch of emails from groupon.de which DKIM Sig didn't verify
successfully in exim, but in Mail::DKIM it does even if I remove the
DomainKeys Sig.

Is there an easy way to feed the .eml file into exim only to debug DKIM?

Greetings, Wolfgang
--
Wolfgang Breyha <wbreyha@???> | http://www.blafasel.at/
Vienna University Computer Center | Austria