Domain is listed but the IP is clean
SURBL lists the domain seen inside messages, not the server that sent them. Find why your domain appeared in spam or phishing mail, then use the SURBL removal form to request delisting once the cause is fixed.
Free Email Blacklist Checker
Paste an email address and we check its domain against a curated set of public domain and reputation blacklists, grouped by importance, in real time. It is free, instant, and runs entirely in your browser with no signup.
Catch problems before they cost you.
Create a free Unspam account to re-run these checks on a schedule and get alerted the moment your setup breaks. No credit card.
What an email blacklist really checks
There is no such thing as a blacklist for a single email address. Spam blacklists are built around DNS, so they track reputation by domain and by sending IP address, not by individual mailboxes. This tool takes the part of your address after the @, then queries SURBL and other public domain blacklists to see if that domain has been flagged in spam, phishing, or malware campaigns. These lists exist because spammers can rotate sending IPs faster than filters can react, so receivers also check the domains that appear inside a message. If your domain shows up on one of these lists, mailbox providers are more likely to filter or block mail that mentions it.
How to read your result
- Not listed
The domain is not currently listed on any of the checked blacklists. This is the result you want, though it does not guarantee inbox placement on its own.
- Listed
Each result row shows which list flagged your domain. SURBL also decodes the listing into a category (phishing, malware, abuse, or cracked site); the other lists report a listing without a category. A listing means the domain has appeared in flagged messages.
- Domain, not address
The result reflects the whole domain, so every mailbox on it shares the same status. Fixing a listing helps everyone who sends from that domain.
- IP reputation is separate
These lists do not cover your sending server. Run the IP blacklist checker on the IP that actually sends your mail to see the other half of the picture.
- Domain registration (RDAP)
The checker also shows the domain's public registration data: registrar, age, expiry, and name servers, fetched directly from your browser against the public RDAP service. A very new or recently re-registered domain often has a weaker reputation, so registration age is a useful signal alongside the blacklist result.
Common problems and fixes
You expected to check one mailbox
Blacklists work at the domain and IP level, so a single address like you@example.com cannot be listed on its own. The checker reports on example.com, and that status applies to every mailbox on the domain.
Clean blacklist but mail still lands in spam
Passing SURBL is necessary, not sufficient. Weak authentication, poor sending history, or low engagement can still hurt placement. Check your SPF, DKIM, and DMARC records and review the sending IP reputation.
A shared or new domain shows a listing
Parked domains, link shorteners, and freshly registered domains are sometimes caught in broad listings. Confirm the listing on the source list, and if it is a false positive, follow that list's dispute process directly.
Questions, answered.
Can you blacklist a single email address?
No. Spam blacklists run on DNS and track reputation by domain and by sending IP, never by an individual mailbox. This tool extracts the domain from the address you enter and checks that domain, which is the realistic meaning of an email blacklist.
Which blacklists does this tool query?
It queries public domain, URI, and reputation blacklists that return a usable answer over browser DNS (SURBL, NordSpam, Suomispam, SEM URIBL, SPFBL, Scientific Spam, and more), grouped by importance. Spamhaus and URIBL block open public resolvers, so they are linked separately to check directly; only a real 127.0.0.2 or higher reply from a queried list counts as a listing.
Does this check Spamhaus?
Not inline. Spamhaus blocks queries from open public resolvers, so a browser tool cannot get a trustworthy result. Instead of faking one, we link it below the results so you can check directly at spamhaus.org. For sending-IP reputation, use the IP blacklist checker instead.
What about my sending IP address?
Domain blacklists are only half the story. The IP that actually transmits your mail has its own reputation and can be listed independently of your domain. Check it separately with the IP blacklist checker so you cover both the domain and the server.
Is the tool free and private?
Yes. It is free with no signup. The blacklist lookup runs in your browser over DNS-over-HTTPS, and the registration panel queries the domain's public RDAP record directly from your browser. Nothing is stored on our side and we never see the addresses you check. For the full picture of how your mail reaches the inbox, see deliverability and inbox placement testing.