DNSBLCHECK

Welcome to DNSBLCHECK

DNSBLCHECK Information provides a single place where you can check that status of your mail server's IP address on more than 50 DNS based blacklists. To start just enter the IP address of your mail server above and press the "CHECK THIS IP" button.

What is a DNSBL?

Domain Name System Blacklists, also known as DNSBL's or DNS Blacklists, are spam blocking lists that allow a website administrator to block messages from specific systems that have a history of sending spam. As their name implies, the lists are based on the Internet's Domain Name System, which converts complicated, numerical IP address such as 140.239.191.10 into domain names like example.net, making the lists much easier to read, use, and search. If the maintainer of a DNS Blacklist has in the past received spam of any kind from a specific domain name, that server would be "blacklisted" and all messages sent from it would be either flagged or rejected from all sites that use that specific list.

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