Blacklist Check
Check whether an IPv4 address is listed on any DNS-based blacklist (DNSBL). These databases track IPs associated with spam, malware or abuse, and mail servers query them to filter traffic. We scan 17 major databases in parallel.
| Blacklist | Status | Details | Time |
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What are DNS blacklists?
DNS-based Blackhole Lists (DNSBLs) are databases of IP addresses linked to spam, malware or other malicious activity. Mail servers query them in real time to decide whether to accept or reject incoming mail. Being listed can hurt email deliverability and may signal a security problem on your network.
Why am I listed?
Common causes include sending spam, hosting malware or phishing, a compromised server or botnet activity, residential/dynamic IP ranges, or weak email authentication (SPF, DKIM, DMARC). If you're listed, visit the specific blacklist's site to request delisting after fixing the underlying issue.