[[ My apologies to all if you see this message twice, or even three times. Various and multiple snaufs on my end are to blame, and I'm sorry. ]]
-=-=-=-=-=-=-=-=-=-=-=- As I was reading again, just now, through the various online documents and man pages relating to filtering, I realized that there exists a rather fundamental anomaly, either with the docs or (more likely) with my understanding. This page: http://www.postfix.org/SMTPD_ACCESS_README.html says that evaluation stops when a result of PERMIT, REJECT or DEFER is produced. However this page: http://www.postfix.org/access.5.html mentions REJECT, DEFER, "OK", and also a number of other possible table lookup results that are not mentioned in the SMTPD_ACCESS_README document. Is "OK" functionally equlvalent to "PERMIT"? In my own local lookup tables, I have mostly been using "PERMIT". Is that either more correct or, alternatively, less correct than using "OK"? Is a table lookup result of, say, "550 Bugger Off!" equivalent, in practice (as regards to continuation of restriction processing) to the keyword "REJECT", as it is described in the SMTPD_ACCESS_README document? (My apologies if these are all FAQs, but the discrepancies between the two documents mentioned above do make things a wee bit confusing.)