not explicitly mentioned but it’s 127.0.0.X where X is the class from https://dronebl.org/classes
http://psbl.org/
query zone: psbl.surriel.com
+ no usage policy, but seems implied that usage is free
+ listing policy
+ no explicit, complete policy given but sending to spamtraps is mentioned to get you listed and seems the exclusive mechanism
+ return codes
+ not documented, probably only boolean
http://rbl.dns-servicios.com/rbl.php
http://rbl.schulte.org/
http://rbldata.interserver.net/
http://www.justspam.org/
http://www.kempt.net/dnsbl/
http://www.leadmon.net/spamguard/
- http://www.rbl.jp/allrbl-e.html
http://www.spamcop.net/
good policy
good reputation
sensible policy
http://www.srntools.com/blacklist/
http://www.uceprotect.net/en/index.php
- http://www.usenix.org.uk/content/rbl.html
- http://zapbl.net/
https://bl.konstant.no/
https://choon.net/rbl.php
- https://puck.nether.net/or/
- might be good
- https://rbl.foobar.hu/
https://www.abuse.ch/
https://www.abuse.ch/?tag=httpbl
https://www.kisarbl.or.kr/
https://www.team-cymru.org/Services/Bogons/dns.html
http://mailspike.net/usage.html
reputation-based
- http://www.spamhauswhitelist.com/en/
- policies for listing and usage on the website
http://www.whitelisted.org/
paid subscription
policy on site
https://puck.nether.net/or/
policies on website
- https://rbl.foobar.hu/
- usage and listing policies on website
http://www.isipp.com/email-accreditation/iadb-query-instruction/
requires signup
- https://choon.net/rbl.php
not quite a usage policy, but seems ok
strange split of ipv4 and ipv6
seems dead?
- https://www.dnswl.org/