When postscreen rejects an incoming email because it exceeds the dnsbl/rbl score, how does it decide which rbl to report back to client as the cause of the rejection - since it only reports one? Is it just the first one to respond? Or random?
See below for an (lightly obfuscated) example: 08:15:26 myhost postfix/postscreen[29782]: CONNECT from [188.59.147.103]:57447 to [192.168.101.82]:25 08:15:26 myhost postfix/dnsblog[29788]: addr 188.59.147.103 listed by domain zen.dq.spamhaus.net as 127.0.0.3 08:15:26 myhost postfix/dnsblog[29785]: addr 188.59.147.103 listed by domain b.barracudacentral.org as 127.0.0.2 08:15:26 myhost postfix/dnsblog[29788]: addr 188.59.147.103 listed by domain zen.dq.spamhaus.net as 127.0.0.4 08:15:26 myhost postfix/dnsblog[29788]: addr 188.59.147.103 listed by domain zen.dq.spamhaus.net as 127.0.0.11 08:15:26 myhost postfix/dnsblog[29791]: addr 188.59.147.103 listed by domain truncate.gbudb.net as 127.0.0.2 08:15:26 myhost postfix/dnsblog[29792]: addr 188.59.147.103 listed by domain hostkarma.junkemailfilter.com as 127.0.0.2 08:15:27 myhost postfix/dnsblog[29787]: addr 188.59.147.103 listed by domain bl.fmb.la as 127.0.0.2 08:15:32 myhost postfix/postscreen[29782]: DNSBL rank 5 for [188.59.147.103]:57447 08:15:32 myhost postfix/tlsproxy[29793]: CONNECT from [188.59.147.103]:57447 08:15:33 myhost postfix/tlsproxy[29793]: Anonymous TLS connection established from [188.59.147.103]:57447: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) 08:15:34 myhost postfix/postscreen[29782]: NOQUEUE: reject: RCPT from [188.59.147.103]:57447: 550 5.7.1 Service unavailable; client [188.59.147.103] blocked using b.barracudacentral.org; from=< plucky...@bosahek.com>, to=<02f...@streamingbats.co.uk>, proto=ESMTP, helo=< narlabsorgtw.bosahek.com>
