Newly Observed Domain Blocklist (NOD)
A newly observed domain blocklist is built using a Passive DNS sensor network and is not reliant on any data from WHOIS allowing it to work across every TLD and ccTLD.
This also means that a domain could have been registered months previously, but not used for email until now.
The list contains all of the newly observed domains identified within the last 25 hours, with each domain wildcarded. Being on the list does not mean the domain is bad, but knowing a domain is new can be useful for other things like scoring or meta-rules like greylisting or sending a temp fail.
For more see Abusix Mail Intelligence Newly-Observed Domains.Back to Glossary