🚫 Blacklist Checker
Check whether a domain's mail server is listed on major email blacklists (DNSBLs). If you're listed, your emails may be landing in spam folders.
About the Blacklist Checker
The blacklist checker tells you whether an IP address or domain is listed on major email blacklists (DNSBLs). These lists are used by mail servers worldwide to block or filter spam, so being listed can quietly send your legitimate email straight to spam or bounce it entirely.
If you run a mail server or send email from your own domain, an unexpected blacklisting can wreck your deliverability without warning. Checking regularly lets you catch a listing early and start the delisting process before it does lasting damage.
Enter an IP or domain to check it against common blacklists instantly and privately.
Frequently asked questions
Is my domain or IP blacklisted?
Enter it above to check against major DNS-based blacklists. If it appears on any, that list may be causing your mail to be filtered or rejected.
Why did my IP get blacklisted?
Common causes include sending spam (sometimes from a compromised account), a misconfigured mail server, or sharing an IP range with a bad sender. Fix the root cause before requesting delisting.
How do I get removed from a blacklist?
First resolve the underlying issue, then follow the delisting process on the specific blacklist's website. Some remove listings automatically over time once the bad activity stops.