seems a bit unstructured and not very well documented
I can’t be arsed to deal with confluence slowing my browser to a halt repeatedly and it’s really hard to navigate but there seems to be some information on https://docs.tornevall.net/display/TORNEVALL/Endpoint%3A+dnsbl+-+DNSBL+v5+with+API+v3
seems active
+ http://rbl.schulte.org/
+ seems active
+ listing policy seems to be: they received spam from an IP
+ usage policy: Anyone can use this RBL list [sic]
+ return codes: probably boolean, i.e. either listed or not
+ http://relaytest.kundenserver.de/
+ by 1und1 (now ionos?), used internally
+ https://www.blalert.com/dnsbl/relays.bl.kundenserver.de
+ no usage policy found
+ no listing policy found
+ no return code explanation found
00_E_PAID
00_E_PRIVATE
88.blacklist.zap
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.schulte.org/
http://rbldata.interserver.net/
- may be dead: http://www.blalert.com/dnsbl/rbl.interserver.net
- http://relaytest.kundenserver.de/
+ listing policy more or less clear
+ usage policy not given but since usage is explained it’s probably free for all
+ return codes seem to be binary, i.e. either listed or not
+ lists IPs
+ lists domains/URIs
http://rv-soft.info/
http://spamcannibal.org/dnsbl_check.shtml
http://spamrats.com/