SPAM-Lists Checker

DNSBL stands for “Domain Name System-based Blackhole List.” It is commonly used by email servers and other services to identify and block IP addresses or domains associated with spam, malware, or other security threats. Checking your IP, domain, or email against these blacklist databases ensures that your service is not being flagged, which could affect the deliverability of your emails or accessibility of your websites.

Our DNSBL Checker tool scans your provided IP address, domain, or email address against 20+ popular DNSBL and public spam blacklists. By doing so, we determine whether your IP/domain/email is flagged as a potential spam source or associated with other malicious activity. The tool provides results quickly, displaying whether or not your input appears on any blacklist.

You simply need to input an IP address, domain name, or email address into the tool. For example:
– IP Address: 203.0.113.0
– Domain: example.com
– Email: info@example.com
– URL: https://example.com/some-folder/some-page.html
Once entered, click the “Check” button to initiate the scan.

Your IP address may be listed for several reasons, such as:
– Sending spam emails or being part of a botnet.
– Hosting or distributing malware.
– Being part of an open relay or proxy.
– Misconfigured email or server settings.
– Recent use of the IP address for suspicious activity.
In some cases, innocent users inherit “dirty” IPs from hosting providers or ISPs due to prior use.

If your IP, domain, or email is blacklisted, follow these steps:
– Identify the root cause: Check your mailing practices, scan your systems for malware, and resolve any technical misconfigurations.
– Visit the blacklist removal page: Click the name of the DNSBL list in the results, which will redirect you to their website. From there, review their delisting instructions.
– Request removal: Most blacklists have a clear process for requesting removal once the issue is resolved. Keep in mind that approval may take anywhere from hours to several days.

Yes, your IP, domain, or email is not marked as a spam threat on any of the listed databases our tool checks. However, keep in mind there are other factors that can affect the performance of your services, such as server issues or poor email reputation, so it’s always good to maintain proper security and hygiene practices.

Our tool checks your IP/domain/email against 20+ prominent spam blacklists, including but not limited to:
– DNSBL
– Spamhaus
– Sorbs
– Barracuda
– SURBL
– URIBL
– CBLC
– …and others.
The tool is updated regularly to include the most relevant and active blacklists.

It’s a good idea to check your IP or domain:
– If you’ve experienced email deliverability issues.
– After a server migration or changing your hosting provider.
– When performing regular security audits.
– If you suspect unusual activity, like an increase in spam complaints.
Frequent checks can help you quickly identify and mitigate any issues.

Here are some essential steps to avoid being blacklisted:
– Keep your systems and email servers secure (e.g., avoid becoming an open relay or proxy).
– Ensure proper email sending practices — send only to verified and opted-in contact lists.
– Regularly check for malware or scripts abusing your server.
– Monitor and authenticate your emails using SPF, DKIM, and DMARC protocols.
– Avoid sending excessively large volumes of emails within a short timeframe.

No, our tool does not store or record any of the input data you provide (IP addresses, domains, or emails). All checks are performed in real-time, ensuring your privacy and data integrity.

Yes, our tool is 100% free to use without any hidden fees or restrictions. You can check as many entries as you like.

We recommend browsing our https://letsextract.com/blog/ and https://letsextract.com/docs/ pages to learn more about DNS-based security, email marketing best practices, and how blacklists work.