IP & Domain Blacklist Checker
Find out if your server IP or domain is listed on major DNS blacklists, a common cause of email going to spam.
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Terms explained
Frequently asked questions
Why is my email going to spam?
A blacklisted sending IP or domain is one of the most common reasons. Also check SPF, DKIM and DMARC with our email DNS checker.
What does "unknown" mean?
Some lists (notably Spamhaus) refuse queries that come through shared public resolvers. The result means the list could not be checked, not that you are listed.
How do I get delisted?
Fix the cause first (compromised account, open relay, bad list), then follow the removal process on each list website. Most lists delist automatically after a clean period.