Good work, Ray, i've worked through it onto the point "grep "rblsmtpd" /var/log/smtpfront-qmail/current" but it gives no results. Pattern matching "rblsmtpd" though the archived maillogs gives no results either.
I'm missing the following entries issuing grep RBLList /home/e-smith/configuration compared to yours in the howto.
MaxMessageSize|10500000|Patterns|enabled|PatternsFile|/var/qmail/control/patterns.default
E-smith 6.0.1 server-gateway mode, just using single sbl-xbl.spamhaus.org.