[exim] DKIM - signing mail

Hello,

I am looking at http://wiki.exim.org/DKIM
Is this experimental or can it be used in production server? I just
want to sign all the outgoing mail. Do I understand correctly that for
this to happen, I will need to:

1/ donwload and compile libdkim
2/ build exim with DKIM support
3/ generate keys and setup dns entry
4/ set up options on the remote_smtp transport?

Many thanks for advice, ideas!

--
Zbigniew Szalbot