Domain Blacklist Check
A domain blacklist check looks up your domain's website and mail-server IPs against DNS blacklists (DNSBLs) that inbox providers use to block spam. This free tool checks your domain and email across 25 DNSBLs — SpamCop, Barracuda, PSBL and more — in one search, and shows exactly which lists flag you and why.
25 DNSBLs · SpamCop · Barracuda · PSBL · UCEPROTECT · Mailspike · Blocklist.de · DroneBL · GBUdb · +more
Which lists are queried, how tiers are weighted and how the score is built are published in the methodology.
Frequently asked questions
How do I check if my domain is blacklisted?
Enter your domain above. We resolve its website (A) and mail (MX) IP addresses and query 25 DNS blacklists (DNSBLs) in one pass, then show which lists — if any — flag you and how serious each one is.
How do I check if my email is blacklisted?
Email blacklisting is really IP blacklisting: providers block the IPs your mail is sent from. This tool resolves your MX (mail) hosts to their IPs and checks them against the same 25 DNSBLs, so an "email blacklist check" and a "domain blacklist check" happen together here.
Why is my domain on a blacklist?
Common causes are a compromised mailbox or server sending spam, a misconfigured or open mail relay, poor sending reputation, or shared/cloud IPs where a neighbour was flagged. Aggressive lists also list whole ASNs or netblocks as collateral — we mark those as advisory so they do not skew your result.
How many blacklists (DNSBLs) does this check?
25, including the authoritative ones inbox providers actually enforce — SpamCop, Barracuda and PSBL — plus a curated set of secondary and advisory lists. Every zone is verified live; lists that have shut down (SORBS, for example) are removed rather than left in to pad the number, because a dead list answers "not listed" for everyone. Spamhaus is queried only when a Data Query Service key is configured, and the report says so when it is not. A hit on an authoritative list is a real deliverability problem; advisory hits are shown separately.
How do I get removed from a blacklist?
First fix the root cause (secure the account, close the open relay, stop the spam). Then request delisting on each list that flags you — most have a self-service removal form. Keep sending clean, authenticated mail (SPF/DKIM/DMARC) so you stay off.