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Blacklist Checker

Run a free blacklist check to see if your domain, IP address or email is listed on Spamhaus, Barracuda, SpamCop and other major email blacklists.

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What is an Email Blacklist Checker?

An email blacklist checker performs an email blacklist check by scanning your domain, IP address, or email against multiple spam databases to identify reputation issues that could prevent your emails from reaching the inbox.

Multi-Blacklist Check

Scan across 8 major blacklist databases including Spamhaus, Barracuda, SpamCop, SURBL, and more in a single search.

Instant Results

Get real-time blacklist status for domains, IP addresses, or email addresses with detailed information about each tracker.

Protect Reputation

Regular monitoring helps you catch blacklist issues early and maintain a clean sender reputation for better email deliverability.

How to Check if Your Domain or IP Is Blacklisted

To check if your domain or IP is blacklisted, run an email blacklist check against major spam databases such as Spamhaus, Barracuda, SpamCop, and SURBL. If your domain appears on a blacklist, it may affect inbox placement and sender reputation.

How Our Blacklist Checker Works

Real-time scanning across major blacklist databases

1

Input Detection

Our tool automatically detects whether you've entered an email address, domain name, or IP address and extracts the relevant information for checking.

2

Database Scanning

We query 8 major blacklist databases simultaneously including Spamhaus ZEN, SORBS, SpamCop, Barracuda Central, SURBL, and the Composite Blocking List.

3

Detailed Report

Receive a comprehensive report showing blacklist status for each tracker with names, descriptions, and actionable removal guidance if needed.

Why Check Email Blacklists?

Prevent deliverability issues before they impact your business

Avoid Email Blocking

When your IP or domain is blacklisted, major email providers like Gmail, Outlook, and Yahoo may completely block your messages or send them straight to spam, resulting in lost business opportunities.

Maintain Deliverability

Regular blacklist monitoring helps you catch issues early and take corrective action before your email deliverability rates decline and damage your sender reputation.

Identify Security Issues

Unexpected blacklisting often indicates compromised accounts, malware, or unauthorized email sending. Early detection helps you secure your systems and prevent further damage.

Protect Brand Trust

Being blacklisted damages your brand reputation and customer trust. Proactive monitoring ensures your business communications remain reliable and professional.

How to get off a blacklist

  1. Confirm the listing. Note which blacklists flag you and whether they list your IP, your domain or both.
  2. Find and fix the cause. Secure compromised accounts, stop sending to old or purchased lists, and remove hard bounces.
  3. Check your authentication. Make sure yourSPF checker,DKIM checkerandDMARC checkresults all pass.
  4. Request removal from each list. Use the official delisting page for every list that flags you (below).
  5. Rebuild your reputation slowly. After delisting, restart at low volume. Anemail warmup toolhelps rebuild reputation after delisting by generating positive engagement while you ramp back up.

Delisting pages for major blacklists

  • Spamhaus (ZEN, DBL, CBL): Look up your IP or domain, follow the removal steps for the specific list, and confirm the cause is fixed.
  • Barracuda Central: Submit a removal request with your IP and a contact email. Requests are reviewed manually.
  • SpamCop: No form needed: listings expire automatically about 24 hours after the spam reports stop.
  • SURBL: Check the domain and follow the instructions to request a review once the listed content is cleaned up.

Why IPs and domains get blacklisted

Spam traps

Old, scraped or purchased lists contain trap addresses that exist only to catch senders who don't clean their lists.

Spam complaints

Recipients clicking "report spam" feed several blacklists directly, SpamCop included.

Compromised accounts or servers

A hacked mailbox, a contact form abused by bots or malware on a server can send thousands of spam emails from your IP.

Sudden volume spikes

A new domain or IP that jumps straight to high volume looks exactly like a spammer's pattern.

Shared IP neighbors

On shared sending infrastructure, another customer's spam can get the IP you also use listed.

Missing authentication

Mail without SPF, DKIM and DMARC is easier to spoof, and abuse of your domain can get it listed.

Related Resources

Learn how to protect your sender reputation

How Email Blacklists Function

Understand how email blacklists work, their impact on deliverability, and steps to avoid being listed.

How to Avoid Email Blacklists

Complete guide on preventing blacklisting, maintaining sender reputation, and ensuring your emails reach the inbox.

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Frequently Asked Questions About Email Blacklist Check

Everything you need to know about email blacklists and reputation monitoring

An email blacklist, also called a blocklist or DNSBL, is a real-time list of IP addresses and domains known to send spam. Mail servers query these lists before accepting a message. If your IP or domain is listed, your emails are more likely to be rejected or filtered to spam by any receiver that uses that list.

Enter your domain, IP address or email address in the blacklist checker above. It queries 8 major blacklists, including Spamhaus ZEN and DBL, Barracuda, SpamCop and SURBL, and shows which ones list you. Check your sending IP as well as your domain, because IP and domain blacklists are separate.

Your IP is usually blacklisted because it sent mail to spam traps, generated spam complaints, or was compromised by malware or a hacked account. High bounce rates from old or purchased lists are a common trigger. On shared IPs, another sender's behavior can also get the whole address listed.

If your IP address is blacklisted, receiving servers that use that list will reject your emails or send them to spam. You may see bounce messages that name the blacklist, a sudden drop in open rates, or replies drying up. The impact depends on which list it is: a Spamhaus listing affects far more mailboxes than a minor list.

To get your IP off a blacklist, first fix the cause: secure compromised accounts, clean your list and stop the traffic that triggered the listing. Then go to the blacklist's own lookup page and request removal. Some lists, like SpamCop, expire listings automatically once the spam stops. Requesting removal before fixing the problem usually gets you relisted.

Removal usually takes anywhere from a few hours to a few days. SpamCop listings expire on their own about 24 hours after the reports stop. Spamhaus and Barracuda review removal requests, which is often fast once the issue is fixed. Repeat listings take longer and may need more evidence that the problem is solved.

No, each email provider uses its own mix of blacklists. Gmail, Outlook and Yahoo rely mostly on their own internal reputation systems, while many corporate mail servers and spam filters query public lists like Spamhaus and Barracuda. That is why it pays to check several blacklists and also watch your reputation in tools like Google Postmaster.

Yes, most blacklistings are preventable. Authenticate your mail with SPF, DKIM and DMARC, only email people who opted in or are a good fit, remove bounces quickly, and ramp up volume gradually on new domains and IPs. Check your blacklist status regularly so you catch a listing before it hurts your deliverability.

Improve Your Email Deliverability

Detected blacklist issues? Use Mailwarm to rebuild your sender reputation and ensure your emails reach the inbox. Want the full picture? Run a free email deliverability test.

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