Free email blacklist checker

An email blacklist (or DNSBL) is a real-time database that identifies IP addresses or domains known for sending spam. Email service providers check these lists to decide whether to accept your emails or send them to the spam folder.

Each blacklist has its own removal process. Generally, you need to: 1) Identify the cause (spam complaints, malware, etc.), 2) Fix the issue, and 3) Request removal (delisting) via the blacklist's website. Our tool provides links to delisting pages where available.

Yes, significantly. If your IP or domain is on a major blacklist like Spamhaus or SpamCop, your emails will likely be blocked or sent to spam by major providers like Gmail, Outlook, and Yahoo.

We recommend checking weekly, or immediately if you notice a drop in open rates. Regular monitoring helps you catch issues early before they damage your sender reputation permanently.