Quoting Austad, Jay (austad at marketwatch.com):
>  If you're going to use qmail, you *NEED* to use ucspi-tcp for the relay
> restrictions to work properly.  But, qmail will most likely turn out to be
> more trouble than it's worth.  Check out postfix when you've decided you've
> had enough with qmail.  :)

And when your tired of postfix, look at exim.
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