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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.

Enter a domain to check its web and mail servers, or a server's IPv4 address.

What this 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.