help in configuring postfix domainkeys and dkim

[keichee]

can someone share their config in postfix, domainkeys and dkim that is
working for all domains?

i need dkim and domainkeys to be signed for all domains that is listed
in server, must be a catch all not from a list

i followed the wiki of ubuntu but i think someone had sabotaged it as
there are many errors when following it step by step

thanks for your help