qpsmtpd or qpsmtpd-server or qpsmtpd-forkserver

[roger-qp-list]

        As just installed, it appears that the run file invokes 'qpsmtpd'.
The qpsmtpd-server wants to use Qpsmtpd::SelectServer instead of
Qpsmtpd::TcpServer. Okay, what's the difference?

        And since I want to run the forkserver version anyway, should my
run file use 'qpsmtpd-forkserver' instead of 'qpsmtpd'?

        Thanks.