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Issue DNSBL using reject_rbl_client

LittleMan8

New Pleskian
Hello everyone,
I've recently started using the DNSBL feature of Plesk to decrease the amount of spam my server receives. I'm using two block lists, so reject_rbl_client is inserted into /etc/postfix/main.cf twice.

What I'm noticing is that connections attempts are sometimes blocked and sometimes they are not - although they happen only minutes from each other with the same IP address.

From reading Postfix' man page, it seems the DNSBLs are always checked in the same order (see quote below). So a connection attempt should always result in the same outcome (except when the DNSBL changes, of course).

Do you guys have an explanation for this behavior?

http://www.postfix.org/postconf.5.html said:
Restrictions are applied in the order as specified; the first restriction that matches wins.
 
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