Doh! Strange why I'm just having trouble in the last month.
well, for a long time they were sending a default 'block' for all queries, to try to discourage connections. maybe for some reason your setup was happy enough with that to keep running. maybe they've turned off the 'block' now too.
Any other good one I should use?
www.rbls.org gives a pretty thorough listing of all of them, but you should check out the URL associated with each before using - some are conservative, some are extreme. i err towards conservative:
/usr/local/bin/rblsmtpd \ -r "sbl-xbl.spamhaus.org:\ Probable spam connection rejected. Details at http://www.spamhaus.org" \ -r "list.dsbl.org:\ Probable spam connection rejected. Details at http://www.dsbl.org" \ -r "relays.ordb.org:\ Probable spam connection rejected. Details at http://www.ordb.org/faq" \ -t10 \
as others have pointed out (recently) you have to patch rblsmtpd to be able to do custom replies. the '-t10' i consider a necessity these days - waiting sixty seconds for a response from an rbl is, well, insane. ten seconds is far more reasonable, unless you enjoy backlogs of thousands of messages from time to time.
Paul Theodoropoulos http://www.anastrophe.com http://www.smileglobal.com