Blacklist Checker
Check whether your IP address or domain is on spam blacklists that block your emails — and find out how to get removed.
Spamhaus and some URI lists refuse lookups from public DNS services, so they are not included. Check Spamhaus at check.spamhaus.org.
Lookups run from your browser through public DNS-over-HTTPS. Nothing is stored.
How to use the Blacklist Checker
Enter an IP or domain
Your mail server IP or website domain.
We check 30+ lists
All lookups run at the same time.
Get delisted
Links to each blacklist’s removal page.
Why use our Blacklist Checker?
30+ blacklists
IP and domain based DNS blacklists.
Fast
Every list is queried in parallel.
Domain & IP
Domains are resolved and checked on URI lists too.
Delist links
Go straight to the removal form.
Reasons
Return codes explained where available.
Re-check
Check again after delisting.
Frequently asked questions
Everything you need to know about the Blacklist Checker.
Back to the toolWhat is an email blacklist?
A public list (DNSBL) of IP addresses and domains that sent spam. Many mail servers reject messages from listed addresses.
Why is my IP blacklisted?
Usually because of spam from a hacked account, a compromised website, a shared hosting neighbour, or sending to many invalid addresses.
How do I get removed?
Fix the cause first, then use the delisting link for each list. Some lists remove entries automatically after a few days.
Why is Spamhaus not shown?
Spamhaus blocks lookups from public DNS services, so results would be unreliable. Check it directly at check.spamhaus.org.
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