While I haven't used qmail in many years (not sure why anyone would want to start now), I never really used the docs from qmail.org as they were always somewhat hard to follow. The method they use is very dated and isn't really the way you'd want to manage it in a modern OS. I'd recommend looking at lifewithqmail.org & qmailrocks.org. Both provide scripts to help you get everything setup (though I'd be surprised if they didn't need some modification to work with the latest OS).
As for the test instructions, It's just a few commands you run via a telnet session.
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