mailcow-dockerized/data/conf/postfix/config_templates/dns_blocklists.cf.j2

postscreen_dnsbl_sites =
  wl.mailspike.net=127.0.0.[18;19;20]*-2
  hostkarma.junkemailfilter.com=127.0.0.1*-2
  list.dnswl.org=127.0.[0..255].0*-2
  list.dnswl.org=127.0.[0..255].1*-4
  list.dnswl.org=127.0.[0..255].2*-6
  list.dnswl.org=127.0.[0..255].3*-8
  bl.spamcop.net*2
  bl.suomispam.net*2
  hostkarma.junkemailfilter.com=127.0.0.2*3
  hostkarma.junkemailfilter.com=127.0.0.4*2
  hostkarma.junkemailfilter.com=127.0.1.2*1
  backscatter.spameatingmonkey.net*2
  bl.ipv6.spameatingmonkey.net*2
  bl.spameatingmonkey.net*2
  b.barracudacentral.org=127.0.0.2*7
  bl.mailspike.net=127.0.0.2*5
  bl.mailspike.net=127.0.0.[10;11;12]*4
{% if not SKIP_SPAMHAUS %}
{% if not SPAMHAUS_DQS_KEY %}
  zen.spamhaus.org=127.0.0.[10;11]*8
  zen.spamhaus.org=127.0.0.[4..7]*6
  zen.spamhaus.org=127.0.0.3*4
  zen.spamhaus.org=127.0.0.2*3
{% else %}
  ${SPAMHAUS_DQS_KEY}.zen.dq.spamhaus.net=127.0.0.[4..7]*6
  ${SPAMHAUS_DQS_KEY}.zen.dq.spamhaus.net=127.0.0.[10;11]*8
  ${SPAMHAUS_DQS_KEY}.zen.dq.spamhaus.net=127.0.0.3*4
  ${SPAMHAUS_DQS_KEY}.zen.dq.spamhaus.net=127.0.0.2*3
{% endif %}
{% endif %}

{% if SPAMHAUS_DQS_KEY %}
postscreen_dnsbl_reply_map = texthash:/opt/postfix/conf/dnsbl_reply.map
{% endif %}