Following the recommendations from the Wiki (
http://wiki.contribs.org/Email#Real-time_Blackhole_List_.28RBL.29), I have for a long time and with good success used three RBLs: zen.spamhaus.org, whois.rfc-ignorant.org, and dnsbl.njabl.org.
This morning my server suddenly started to reject most incoming qpsmtpd connections with messages like this:
2014-02-22 05:57:26.191085500 4408 logging::logterse plugin (deny): ` 123.456.78.90 Unknown [192.168.100.5] <peter.petersen@rowindo.com> rhsbl 901 v=spf1 msg denied before queued
I checked the qpsmtpd log-files, and at least for the last few weeks, I've not before seen mail connections rejected with a rhsbl tag. But from this morning, nearly all connections were rejected with the rhsbl tag. I checked the qpsmptd configuration and then found out that only the zen.spamhaus.org list seems to be working. I can't find IP addresses for the other two, whois.rfc-ignorant.org and dnsbl.njabl.org.
So I changed the qpsmtpd configuration:
config delprop qpsmtpd SBLList
config setprop qpsmtpd RBLList zen.spamhaus.org
signal-event email-update
And now things seems to be working fine again. So I guess that maybe the closed services caused qpsmtpd to reject all my incoming mails?
Jesper, Denmark