Email Blacklist Check
Emails landing in spam? See whether your mail server or domain is on a spam blacklist that mail providers check, why it was listed, and how to get removed.
What this tool checks
- Your mail server against the 8 IP blacklists mail providers actually use, including Spamhaus ZEN and SpamCop
- Your domain against the Spamhaus DBL, SURBL and URIBL, which filter links in messages
- Mail and web server addresses found automatically from your DNS
- Why each listing happened, in the list's own words, with its removal page
- A step-by-step fix, and whether the problem is blacklists or authentication
- Enter an IPv4 address to check a single server
How to read the results
- Pass
- The check succeeded based on the observed responses.
- Warning
- Works now, but is risky, unusual or worth reviewing.
- Fail
- A problem was observed directly in the responses.
- Inconclusive
- Not enough evidence — for example a server did not respond.
Frequently asked questions
- How do I check if my domain is blacklisted?
- Enter the domain above. The check finds your mail and web server addresses from DNS, looks each one up on the IP blacklists mail providers use, and checks the domain itself on the Spamhaus DBL, SURBL and URIBL.
- How do I get my IP or domain off a blacklist?
- Fix the cause first, usually a compromised mailbox, an abused web form or an open relay, then use the list's removal page linked in the result. Many lists, including SpamCop, delist automatically once the spam stops.
- Will a blacklist listing send my email to spam?
- A listing on a major list such as Spamhaus ZEN gets mail rejected or filtered by many providers. Smaller lists are used by fewer receivers and matter less.
- Can I check an IP address instead of a domain?
- Yes. Enter an IPv4 address to check a single server against the IP blacklists.