I use the spamhaus blacklist with various SMTP servers and it works nicely.
However, recently on a server running Postfix 1.1.11 (yes, I know) it appears
to have stopped working properly. I get lots of messages such as this in the
Apr 17 00:41:31 pogo1 postfix/smtpd: warning: \
220.127.116.11.sbl-xbl.spamhaus.org: RBL lookup error: \
Name service error for 18.104.22.168.sbl-xbl.spamhaus.org: \
Host not found, try again
Now surely in the normal course of event, this is (hopefully) what you'll see
more of i.e. failed lookups because the host is NOT in the list. So, why is
that being reported? Also, in the current logs I am seeing NO RBL rejected
messages. I suppose it's possible that the spammers have stopped sending mail
to this server, but I doubt it, somehow.
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