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Blocklist Checker

Looks up a sending IP, or the IPs of a domain's mail servers, on six DNS blocklists, says which list answered what, and links each listing to its removal page.

@emailens/engine 0.18.22 · data last changed 10 Nov 2026

Example: example.com, a made-up domain with a sample listing. Check yours above.

failexample.com

Listed on SpamCop

Receivers that use these lists reject or junk mail from a listed address. Find and stop the cause first (a compromised account, a bought list, a form without confirmation), then ask each list for removal from its own page below.

Mail server mx.example.com

203.0.113.7

IP blocklists

  • Fail: SpamCop: listed

    203.0.113.7 answered 127.0.0.2 · widely used in filtering

  • Pass: Barracuda (BRBL)

    Clean

  • Pass: Mailspike

    Clean

  • Pass: PSBL

    Clean

  • Pass: UCEPROTECT Level 1

    Clean

Domain blocklist

  • Pass: URIBL

    Clean

Request removal

Spamhaus isn't queried here: its free lists refuse lookups made through public DNS. Check 203.0.113.7 on Spamhaus.

The checker needs a computer screen.

The lists it checks

SpamCop
Lists IPs reported by people who received their mail as spam. A listing expires on its own once reports stop.
Barracuda
Barracuda's reputation list (BRBL), used by its filters and by many corporate mail servers. Removal is a form on its site.
Mailspike
A reputation list built from mail traffic, used by default in Rspamd-based filters.
PSBL
The Passive Spam Block List: IPs that sent to its spam traps. Few receivers use it; removal is self-service.
UCEPROTECT
Level 1 only, which lists the IP alone. Its levels 2 and 3 list whole ranges and networks, so many receivers ignore it.
URIBL
Domains only: lists domains that appear in spam, so a filter can score the links in a message. Checked when you enter a domain.

A clean IP is half of it. Check SPF, DKIM and DMARC next, or read how they fit together.

Your next question

Other free tools: DKIM Checker · DMARC Checker · BIMI Checker · DMARC Report Reader · DMARC Record Generator · Email Spam Checker

Run this check on every email

Check again a day after a removal request: lists update on their own schedule, and SpamCop drops a listing once the reports stop.

Questions

What is an email blocklist?

A DNS blocklist (DNSBL) is a list of IP addresses, or domains, that sent spam or hit spam traps. A receiving mail server looks up the sending IP on the lists it trusts as each message arrives, and rejects or scores the mail when the IP is listed. This checker makes the same DNS lookups and tells you what each list answered.

Why isn't Spamhaus checked here?

Spamhaus's free lists refuse lookups made through public DNS resolvers, which this tool uses, and its free Data Query Service is for non-commercial use. Rather than show a result we can't stand behind, the result links to Spamhaus's own IP reputation checker.

Should I check my IP or my domain?

Your sending IP, when you know it: it's in the Received headers of an email you sent, and the email header analyzer finds it for you. A domain checks the IPs of its mail (MX) servers, which receive your mail and often send it too on a self-hosted server, and the domain itself on URIBL. If you send through an email provider, its shared IPs are its own to keep clean.

How do I get removed from a blocklist?

Stop what caused the listing first: a compromised account or server, a bought or old list, a signup form without confirmation. Then use each list's own removal page, linked under the result. SpamCop needs no request: a listing expires once the reports stop.

Does a listing mean my email is blocked?

Only at receivers that query that list. The big mailbox providers rely mostly on their own reputation data, so a listing on a small list may change nothing there, while a SpamCop or Barracuda listing is often enforced by company mail servers. Treat any listing as a sign that mail drew complaints.