Tools / Security & Crypto
Spam Blacklist (DNSBL) Check
Check an IPv4 address against public DNS blocklists
The lookup is made by our server against public DNS; only the domain/IP you enter is used.
About this tool
Check an IPv4 address against public DNS blocklists (DNSBLs) that mail servers consult. Being listed can make your email bounce. Lists that refuse public resolvers are not queried, and the tool says so.