Email Blacklist Checker - Free Online IT Tool

🚫 Email Blacklist Checker

Check if an email server IP or domain is listed on major spam blacklists.

ℹ️ About Email Blacklist Checker

The Email Blacklist Checker is a diagnostic tool that queries major Real-time Blackhole Lists (RBLs) to see if your mail server's IP address has been flagged for sending spam. If your IP is blacklisted, your emails will likely be rejected or sent to spam folders by major providers like Gmail, Outlook, and Yahoo.

This tool checks against industry-standard lists like Spamhaus, Spamcop, and SORBS. Being listed can happen if your server is compromised, misconfigured, or if you are sending bulk mail without proper hygiene. Identifying a blacklist entry is the first step in the remediation process, allowing you to clean up your traffic and request a removal from the list provider.

📖 How to use Email Blacklist Checker

1. Enter the IP address or hostname of your mail server.
2. Click 'Run Tool' to perform the multi-list lookup.
3. Check the 'Results' section. Any 'LISTED' status indicates your IP is on that specific blacklist.
4. If listed, visit the provider's website (e.g., spamhaus.org) to find the reason and follow their delisting instructions.

❓ Frequently Asked Questions

How did I get on a blacklist?

The most common reasons are sending unsolicited bulk mail, having a 'spambot' malware infection on your network, or having an open relay configuration.

Does this tool check every blacklist?

This tool checks the most influential and widely used RBLs. There are hundreds of smaller lists, but Spamhaus and Spamcop are the most critical for global deliverability.

How do I get removed from a blacklist?

You must first fix the underlying issue (e.g., stop the spam traffic), then visit the blacklist provider's site and use their 'lookup' or 'delisting' tool to request removal.