Domain Blacklist Check
Check if your domain or server IP is on a spam blacklist (Spamhaus, SpamCop, SURBL and more). The #1 reason emails stop being delivered.
Blacklists explained in plain language
What DNSBL lists are, how you end up on them and how to get delisted.
What is a blacklist (DNSBL)?
A public register of IP addresses and domains caught sending spam. Mail servers (including Gmail and Outlook) query these lists before accepting a message — being listed means your mail gets rejected or lands in spam.
How did I end up on one?
Common causes: a hacked website sending spam, missing SPF/DKIM/DMARC records, shared hosting where a neighbour spams from the same IP, or a mailing sent to bought address lists.
How do I get delisted?
Fix the cause first (malware, open relay, missing authentication), then submit the removal form linked next to each list in your result. Most lists delist within 24–48 hours; some do it automatically once the spam stops.
How do I stay off blacklists?
Publish correct SPF, DKIM and DMARC records, keep your CMS updated, send only to people who opted in, and monitor your domain regularly — this tool plus our email security test cover the basics for free.
Emails going to spam?
Blacklists are only half the story. Test SPF, DKIM and DMARC for your domain and get an A–F grade in seconds.
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