How to use domainkeys_sign

[abhilash s]

Hi All,

       I would like to use domainkeys_sign plugin for my mail system.
I had copied the plugin from here :

http://wiki.qpsmtpd.org/plugins:spam:domainkeys_sign

But when I used it, I don't  see any DomainKey-Signature: in  mail
header. Also I would like to know is it designed for only outgoing
mails?

I have created the files in the specified folder.(config/domainkeys) .
This folder contain one .private and .public files.

I think it is return DECLINED  from here :

 unless ($self->connection->notes('authuser')) {
       return DECLINED;
   }

Can anyone please tell me whether it need any additional configuration
or options in config file ?

Thanks,

Abhilash.S