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DNSBL blacklist check

tested from the server

Is an IP address or domain listed on spam blocklists.

Read more: Why does my e-mail go to spam? DNSBL, PTR, SPF, DKIM and DMARC

More toolsDNS lookup SSL/TLS checker E-mail: SPF, DKIM, DMARC IPv4 subnet calculator IPv6 subnet calculator

Tools

Addressing

Domains and certificates

Internet

Server-side diagnostics

Content

Information

Where the data comes from

Calculators run in your browser. DNS, whois and BGP use public services, and the tests marked “server” (SSL/TLS, ports, traceroute, MTU, DNSBL) run from the routing.pl server.