Blacklist Lookup

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About Blacklist Lookup

Free Blacklist Lookup Tool – Check If Your Domain or IP Address Is Blacklisted

Are your emails ending up in spam folders or bouncing back? Use our free online Blacklist Lookup tool to instantly check if your domain or IP address is listed in over 50+ real-time DNS-based blacklists (DNSBL). Whether you're running email campaigns or managing a web server, this tool helps protect your email reputation and improve deliverability.

What Is a Blacklist Lookup Tool and Why You Need It?

A DNS blacklist checker scans publicly accessible spam databases like Spamhaus, SORBS, and Barracuda to see if your IP or domain is flagged. This tool is essential for businesses and marketers wondering "is my domain blacklisted?" or "how to check if my IP is blacklisted for sending spam emails?"

Most Common Reasons Your IP Might Be Blacklisted

Sending bulk emails without proper email authentication (SPF, DKIM, DMARC)
Hosting infected files or malware unknowingly
Using a shared server with spammy neighbors
Compromised website sending malicious scripts

How to Use Our Email Blacklist Lookup Tool

Enter your domain name or IP address in the input box.
Click “Check Blacklist Status.”
Get a detailed report showing your listing status across all major spam blocklists.

Why Our Blacklist Checker Is the Best

Free & Unlimited: Use it as often as needed — completely free!
Live Results: We check over 50 blacklists including Spamcop, UCEPROTECT, and more.
Fast Diagnosis: Know immediately if your domain or IP is affecting email deliverability.

Boost Your Email Reputation Today

Once you discover a blacklisting issue, act fast. Contact your host, clean up your domain reputation, and implement proper email protocols. Use our Email Privacy Checker to ensure you're not exposing sensitive headers that can trigger spam filters.