= Spamhaus =

https://www.spamhaus.org/

Passive DNS
https://twitter.com/SpamhausTech/status/1293877981342052353?s=20

https://www.spamhaustech.com/resource-center/what-is-passive-dns-a-beginners-guide

== zen ==

== SBL ==
The Spamhaus Block List

The Spamhaus Block List ("SBL") Advisory is a database of IP addresses from which Spamhaus does not recommend the acceptance of electronic mail.


Exploits Block List

The Spamhaus Exploits Block List (XBL) is a realtime database of IP addresses of hijacked PCs infected by illegal 3rd party exploits, including open proxies (HTTP, socks, AnalogX, wingate, etc), worms/viruses with built-in spam engines, and other types of trojan-horse exploits.

If your IP address is listed by the XBL, see the XBL FAQs for solutions.

== PBL ==

The Policy Block List

The Spamhaus PBL is a DNSBL database of end-user IP address ranges which should not be delivering unauthenticated SMTP email to any Internet mail server except those provided for specifically by an ISP for that customer's use. The PBL helps networks enforce their Acceptable Use Policy for dynamic and non-MTA customer IP ranges.


== DBL ==



[[/DBL]]