[exim] DKIM and DomainKeys

is it possible to sign emails with both DKIM and DomainKeys?

I have Googled and found a few posts asking the same thing
http://old.nabble.com/Exim,-DKIM-and-DomainKeys---possible--td19473691.html

the response said there was a patch but not stable yet? but that was
over 2 years ago... does anyone know if there is a better way to do it?


Derek