Check an IP or domain against 20 DNSBL blacklists: Spamhaus, SpamCop, SORBS and more
DNSBL (DNS-based Blackhole Lists) are real-time spam databases used by mail servers to block unwanted email. Being listed on a blacklist can severely impact your email deliverability and server reputation. Our tool checks your IP or domain against 20 major blacklists including Spamhaus, SpamCop, SORBS, Barracuda Central, and more.
If your IP is listed, use the delisting links provided to request removal from each blacklist. Common reasons for blacklisting include sending spam, running an open relay, or being part of a botnet. After delisting, use our DNS Lookup to verify your server's MX records and SSL Checker to ensure your mail server certificate is valid.
DNSBL (DNS-based Blackhole List) is a list of IP addresses reported for spam. We check 20+ such lists.
Contact the DNSBL owner for delisting. Usually you need to fix the cause (open relay, compromised server) and submit a request.