Email blocklist · DNSBL · IP addresses
THU · 11 JUN 2026
Mailspike Reputation
About
Reputation list (rather than pure blocklist) returning a score for each IP. Useful as a scoring input in mail filters that support graduated decisions.
Listing criteria
IP reputation database with multiple return codes indicating reputation score from 'good' through 'malicious'. Useful for nuanced scoring rather than binary block/accept.
How to query
For an IP address 1.2.3.4, query reversed-octets-dot-zone:
dig +short 4.3.2.1.rep.mailspike.netA returned IP (such as 127.0.0.2) means listed. Each blocklist has its own set of return codes meaning different things; the operator's documentation explains theirs.