Free · 15 blacklists · No account needed

Free Email Blacklist Checker

Check if your domain or IP is listed on major email blacklists. We check 15 DNSBLs in seconds — including Spamhaus, Barracuda, SpamCop, and SORBS.

15 blacklists checked — including Spamhaus SBL, XBL, PBL, DBL · Barracuda BRBL · SpamCop · SORBS · SURBL · URIBL
Enter your domain — we'll resolve the sending IP and check both domain and IP blacklists
⟳

Checking against 15 blacklists…

Spamhaus SBLSpamhaus XBL Spamhaus PBLSpamhaus DBL Barracuda BRBLSpamCop SORBS SPAMSURBL URIBLUCEPROTECT MailspikeNordSpam Truncate

About email blacklists

What is an email blacklist (DNSBL)?
A DNS-based Blackhole List (DNSBL) is a database of IP addresses or domain names known to send spam. Mail servers query these lists before accepting email — if the sender's IP or domain is listed, the email may be rejected or marked as spam. Being listed on a major DNSBL like Spamhaus can cause significant deliverability problems.
Why is my domain or IP blacklisted?
The most common causes: your server sent spam (directly or via malware), your IP is in a range reserved for residential or dynamic use (Spamhaus PBL), you were reported by spam trap hits, or a previous owner of the IP had a bad sending history. Some listings are automated; others require human review. See our full guide: How to get your domain removed from email blacklists →
How do I get removed from Spamhaus?
For SBL (spam source) listings: identify and stop the spam source, then submit a removal request at spamhaus.org/lookup. For PBL (policy block) listings: if your IP shouldn't be on PBL, request removal directly — PBL typically lists dynamic/residential IPs that should use their ISP's smarthost. Fix the root cause before requesting removal or you'll be re-listed.
How do I get removed from Barracuda BRBL?
Visit barracudacentral.org/lookups, enter your IP, and submit a removal request. Barracuda requires you to confirm the issue is resolved and that you have proper email authentication (SPF, DKIM, DMARC) in place. Removal is usually processed within 12 hours if the request is legitimate.
Does being listed on one blacklist affect all email?
It depends on which blacklist and which receiving servers. Major enterprise mail platforms (Microsoft, Google, Proofpoint) use Spamhaus heavily. A Spamhaus SBL or CSS listing will cause rejections at a large percentage of recipients. Smaller DNSBLs have less coverage but still affect some recipients. Multiple listings compound the problem significantly.
How do I prevent getting blacklisted?
Maintain proper email authentication (SPF -all, DMARC p=reject, DKIM), monitor your sending reputation, use confirmed opt-in for mailing lists, process unsubscribes immediately, monitor bounce rates and spam complaints, and never send to purchased lists. Use Inbox Shield to get alerted if your DMARC or SPF configuration changes.