Blacklist Checker

Check if your IP address or domain is blacklisted on spam databases, DNSBL, and reputation services

Not Blacklisted

Your IP is clean across all checked databases

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Clean
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Listed
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Blacklist Results

Enterprise Email Deliverability

Monitor your sending reputation, prevent blacklisting, and ensure your emails reach the inbox.

Bulk IP/Domain Checking
Automated Monitoring
Delisting Assistance
API Access
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Frequently Asked Questions

What is a blacklist?

A blacklist (also called blocklist) is a database of IP addresses or domains known to send spam or engage in malicious activity. Email servers and security systems check these lists to block unwanted traffic and protect users.

Why might my IP be blacklisted?

Common reasons include: sending spam (intentionally or through compromised accounts), malware infections, open mail relays, poor email list hygiene, sudden high email volume, or sharing an IP with spammers on shared hosting.

How do I get delisted from a blacklist?

Each blacklist has its own delisting process. Generally: 1) Identify and fix the issue that caused the listing, 2) Visit the blacklist's website, 3) Submit a delisting request, 4) Some lists auto-delist after the issue is resolved.

Which blacklists are most important?

Spamhaus, Barracuda, SORBS, and SpamCop are among the most widely used. Being listed on these can significantly impact email deliverability. Google Safe Browsing affects web traffic rather than email.

Checking blacklists...