Email Blacklist Checker
Check a domain's mail-server IPs against common DNS-based blocklists and see the next steps if a sending IP is listed.
Start Here
Enter a domain and run Email Blacklist Checker.
Review the Blacklist Checker Result
Review the status, warnings, and recommended actions shown in the result panel.
Ready When You Are
Run Email Blacklist Checker to see the Blacklist Checker result and next actions.
About Email Blacklist Checker
Public blocklists are lists used by some mail systems to flag domains, hostnames, or IP addresses connected with unwanted mail. A listing does not always mean every inbox will reject you, and a clean public result does not guarantee inbox placement. The email blacklist checker focuses on public blacklist-style signals and explains what to confirm before you panic. Read Blocklists and Link Reputation for the safe recovery process.
The most important step is fixing the cause before requesting removal. A sender can be listed because of spam complaints, poor list sources, hacked mail, bad links, risky redirects, or shared infrastructure. The email blacklist checker helps you identify whether the blacklist result is clear, risky, or needs manual confirmation. Use Sender Reputation and Spam Rate to review behavior signals that often sit behind blacklist problems.
What Email Blacklist Checker Checks
- Domain, MX host, or IPv4 input detection
- MX mail-server discovery for domains
- Mail-server IPv4 lookup
- DNSBL lookups for common public blocklists
- Warnings about public-resolver limits
- Delisting and root-cause fix guidance
Questions
Why can blacklist results be inconclusive?
Some blocklists restrict public DNS resolvers. A browser-based tool can check common DNSBL responses, but your mail server's own resolver is the best place to confirm final blocking behavior.
Should I request delisting immediately?
No. Fix the cause first. If the same sending pattern continues, the IP can be listed again quickly.