Rich Wales:
> If I enable postscreen and specify my choice of blocklists and whitelists
> in postscreen_dnsbl_sites, am I correct in assuming that I might as well
> remove any reject_rbl_client and permit_dnswl_client clauses from my
> smtpd_*_restrictions, since they will now be redundant?
Almost. Note that postscreen caches the results of successful tests,
so that it does not repeat every test for every connection. This
is controlled by the postscreen_mumble_ttl parameters.
postconf | grep 'postscreen_.*_ttl'
Wietse
