On Fri, Apr 27, 2012, at 03:12 PM, Wietse Venema wrote: > For small sites, postscreen has an up-front blacklist that kicks > off clients before wasting resources on them.
Although I was warned off postscreen in an earlier post being 'heavier' than the checks against locally cached DNS, your comment's consistent with my initial read about postscreen. Iiuc it, too, uses a standard postfix SMTP process, and probably does that local DNSBL IP caching as well. Sounds like the lightest solution, without additional clever patching or dameon writing, may well be postscreen 'out front'. I-- Thanks, Karen
