<IfDefine HAVE_DNSBL_LOOKUP>
  <IfModule !mod_dnsbl_lookup.c>
    LoadModule dnsbl_lookup_module    extramodules/mod_dnsbl_lookup.so
  </IfModule>
</IfDefine>

<IfModule mod_dnsbl_lookup.c>

    # Enable module
    #DnsblLookups On
    # 
    # The following define positive matches for the chain I call "spammers"
    #
    # Any non-failure result from sbl.spamhaus.org is a positive match
    #DnsblZone spammers	sbl.spamhaus.org.	any
    #
    # The 127.0.0.2 result from cbl.abuseat.org is a positive match
    #DnsblZone spammers	cbl.abuseat.org.	127.0.0.2
    #
    # Only the specific codes 127.0.0.5,6,9 from dnsbl.sorbs.net are positive
    # The module internally caches queries, only one actual DNS query is made
    #DnsblZone spammers	dnsbl.sorbs.net.	127.0.0.5
    #DnsblZone spammers	dnsbl.sorbs.net.	127.0.0.6
    #DnsblZone spammers	dnsbl.sorbs.net.	127.0.0.9
    #
    # The following define positive matches for the chain I call "whitelist"
    #
    # A zone designed for whitelisting, any mail from Canada is positive
    #DnsblZone whitelist	ca.countries.nerd.dk.	127.0.0.2
    #
    # A local zone we run, customers or partners of ours are positive
    #DnsblZone whitelist	customers.dnsbl		any
    #
    # A chain for RHSBL lookups (distinct from DNSBL chains)
    #
    #RhsblZone spammers	rhsbl.ahbl.org.		127.0.0.2

</IfModule>