http://spamstinks.com/
cert is for generic hostname
website shows some login form
+ http://virbl.bit.nl/
+ https://www.rollernet.us/2017/01/shutdown-of-virbl-dnsbl-bit-nl/
+ January 23, 2017: »The Virbl-project site has been replaced by this static message to inform those that find their ways here. The Virbl DNSBL-zone was emptied and will be removed all together at a moment further on in the future.«
00_NEEDS_RECHECK
https://antispam.imp.ch/
no usage policy
usage policy documented
listing policy not really clear
return codes documented
- http://virbl.bit.nl/
http://wpbl.info/
http://www.aupads.org/
http://www.backscatterer.org/