Install DomainKey for Qmail

[stilmark]

I'd like to install a DomainKey for Qmail, however, the only installation instructions I've found are:

http://jeremy.kister.net/howto/dk.html

Seems a bit gritty - does anyone know of an easier way to install a DomainKey?

More on DomainKeys:

http://antispam.yahoo.com/domainkeys