Check if your IP address or domain is listed on major email blacklists. We check 20+ blacklists including Spamhaus, Barracuda, SpamCop, SURBL, and more.
Email blacklists are databases of IP addresses and domains known to send spam. Being listed can cause your emails to be blocked or filtered by major providers like Gmail and Microsoft 365.
Not all blacklists are equal. Critical lists like Spamhaus are used by billions of mailboxes, while low-severity lists may have high false-positive rates and limited impact.
If you use Google Workspace, Microsoft 365, or other shared services, blacklist issues on shared IPs are managed by your provider and may not require your action.
Spamhaus, SURBL Phishing
Used by Gmail, Microsoft, Yahoo. Immediate action required.
Barracuda, SpamCop
Widely used by enterprise. Significant impact.
SORBS, UCEPROTECT L1
Secondary filters. Moderate impact.
UCEPROTECT L2/L3
High false positives. Usually safe to ignore.
Pro Tip: Check your blacklist status regularly, especially after sending large email campaigns. Focus on critical and high-severity listings first. Use our Domain Health Check for comprehensive email authentication analysis.