Email Blacklist Checker

Enter a domain name or IP address to check it against 15 major email blacklists (DNSBLs) including Spamhaus, SpamCop, Barracuda, SORBS, URIBL, and SURBL. Results are fetched in real time — no data is sent to any server.

Checks are performed via DNS-over-HTTPS. No data leaves your browser to EpicTools servers.

How to Use the Email Blacklist Checker

Checking a domain

Enter your sending domain (e.g. yourdomain.com) and click Check Blacklists. The tool will first resolve your domain's A record to find its IP address, then run it against IP-based blacklists (Spamhaus ZEN, SpamCop, Barracuda, SORBS, and others) simultaneously with domain-based checks against Spamhaus DBL, URIBL, SURBL, and NordSpam.

Checking an IP address directly

You can also paste an IPv4 address (e.g. 93.184.216.34) directly into the input. This runs IP-based blacklist checks only, which is useful for checking your outgoing mail server IP separately from your domain.

Understanding the results

  • Clean — The IP or domain was not found on that blacklist. This is the expected result for a healthy sender.
  • Listed — The IP or domain appears on that blacklist. This can cause your emails to be rejected or sent to spam. Click the Delist → link to visit the blacklist's removal page.
  • Error — The DNS lookup for that particular blacklist failed, likely due to a timeout or connectivity issue. Try again if you see many errors.

What blacklists are checked?

The tool checks 10 IP-based DNSBLs and 5 domain-based DNSBLs, covering the most widely used email reputation lists:

  • Spamhaus ZEN — Combines the SBL (spam source IPs), XBL (exploited systems), and PBL (policy blocklist). One of the most respected blacklists.
  • SpamCop BL — Built from real spam reports submitted by SpamCop users.
  • Barracuda — Maintained by Barracuda Networks, widely used by mail servers worldwide.
  • SORBS SPAM — The SORBS SPAM zone covers hosts observed sending unsolicited email.
  • UCEPROTECT L1 & L2 — Individual IP and network-level reputation lists.
  • PSBL — A passive, automated spam blocklist.
  • Mailspike BL — IP reputation data from the Mailspike network.
  • Spamhaus DBL — A domain-based list of spam-related domains.
  • URIBL — Tracks domains advertised in spam messages.
  • SURBL — Combined multi-zone list of spam-advertised URIs.

How does it work?

DNSBL (DNS-based Blackhole List) checks work by reversing an IP address and prepending it to a blacklist hostname. For example, to check if 1.2.3.4 is on Spamhaus ZEN, the tool queries 4.3.2.1.zen.spamhaus.org. If the query returns an A record, the IP is listed. If it returns NXDOMAIN (not found), it's clean. All queries are made through Cloudflare's DNS-over-HTTPS API (cloudflare-dns.com/dns-query) directly from your browser.

What if I'm listed?

Each listed entry includes a Delist → link to that blacklist's removal page. Most blacklists have an automated delist process, though some (like Spamhaus) require you to fix the underlying spam issue first. After delisting, allow 24–48 hours for the removal to propagate before re-checking.