🚫 Blacklist Checker
Checks a domain or IP against major DNS-based email blacklists (DNSBLs), in real time, right in your browser.
Enter a sending IP address, or a domain/hostname — we'll resolve it to an IP automatically.
Lookups use public DNS-over-HTTPS resolvers to query each blacklist's zone directly — nothing is sent to any server of ours. Being listed on one minor DNSBL rarely affects deliverability on its own; Spamhaus ZEN, SpamCop, and Barracuda carry the most real-world weight. If you're listed, most blacklists have a self-service delisting/removal page linked from their own site.
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