Domain Blacklist Checker

Check if your domain or IP address is listed on any of 10 major spam blacklists. Includes Spamhaus, SpamCop, Barracuda, SORBS, and more. Instant results, no signup required.

What does this tool check?

10 Major Blacklists

Checks against Spamhaus ZEN, SpamCop, Barracuda, SORBS, UCEPROTECT, Manitu, Mailspike, PSBL, and WPBL simultaneously.

IP Resolution

Automatically resolves your domain to its IP address, then checks the IP against each DNSBL using real DNS lookups.

Deliverability Impact

Understand which blacklists your domain is on and what impact that has on email deliverability to Gmail, Outlook, and other providers.

Instant Results

All 10 lists are checked in parallel — results arrive in seconds with a clear clean/listed status for each list.

Got questions?

Frequently asked questions

Everything you need to know about Uptrue — no fluff.

What is a DNS blacklist?
A DNS blacklist (DNSBL) is a real-time database of IP addresses known to send spam or engage in malicious behaviour. Email servers query these lists before accepting incoming mail — if the sender's IP is listed, the email may be rejected or sent to spam.
Signs your email is blacklisted include: emails landing in spam folders, delivery failures with error codes like 550 or 554, and low email open rates. Use this free blacklist checker to check your domain against 10 major DNSBL lists instantly.
Each blacklist has its own removal process. For Spamhaus, visit spamhaus.org and submit a removal request after fixing the underlying issue (e.g., securing a compromised server or stopping spam). For SpamCop, the listing will typically expire automatically in 24–48 hours. First, identify and fix the root cause — otherwise you'll be re-listed.
Spamhaus is one of the most widely used and authoritative email blacklists in the world. Their ZEN list combines the SBL (Spamhaus Block List), XBL (Exploits Block List), and PBL (Policy Block List). Being listed on Spamhaus ZEN can severely affect email deliverability.
Emails go to spam for several reasons: your IP or domain is on a blacklist, your SPF/DKIM/DMARC records are missing or misconfigured, your email content contains spam trigger words, or you are sending to unengaged or purchased lists. Check this blacklist checker first, then verify your SPF and DMARC records.

Monitor your blacklist status 24/7

Uptrue's blacklist monitoring checks your domain against spam blacklists daily and alerts you the moment you get listed. Pair it with MX health monitoring so a deliverability hit never goes unnoticed.

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