Hi,
I'm also facing the same problem. I'm running right now with dk_strict set
to false else no mail get sent out with the same error being thrown for all
mail service providers (google, yahoo). I've followed the instructions on
this page
http://wiki.exim.org/ExperimentalSpec and am using exim.4.69 with
experimental_domainkeys support.
Any help much appreciated.
Nishant Kyal
itasveer.com