How to Get Delisted from Abuseat CBL (Composite Blocking List)
How to get removed from the CBL — a list focused on detecting compromised hosts and botnet participation.
Removal Method
Automated self-service removal (instant if issue is fixed)
Time to Removal
Minutes after submitting removal request, if issue is resolved.
Auto Expiry
CBL listings do not auto-expire. You must request removal after fixing the issue.
Overview
The CBL (Composite Blocking List) at cbl.abuseat.org detects and lists IPs exhibiting behavior consistent with spam-sending malware, botnet participation, or open proxies. It is also the primary data source for the Spamhaus XBL, making CBL listings extremely impactful on deliverability.
Why You Might Be Listed
- 1Your server is infected with spam-sending malware or a botnet agent
- 2An open HTTP proxy or SOCKS proxy is running on your server
- 3A web application on your server has been exploited to send spam
- 4Your server has a DNS configuration that facilitates spam (open resolver)
Step-by-Step Removal
Look up your IP
Visit cbl.abuseat.org/lookup.cgi and enter your IP address. The CBL will display the specific detection that triggered your listing, including the date and the type of behavior detected.
Identify the compromised software
The CBL detection page usually indicates what kind of malware or exploit triggered the listing. Use this information to scan your server for the specific threat. Check for unauthorized processes, unexpected open ports, and compromised web applications.
Remove the malware and secure the server
Clean the infection, update all software, patch vulnerabilities, and close unnecessary ports. Ensure no open proxies or relays are running. Change all passwords on the server.
Request delisting
Return to cbl.abuseat.org/lookup.cgi and click the removal button. CBL delisting is automated — if the issue is resolved, removal happens within minutes. If you are relisted quickly, the underlying issue was not fully resolved.
Official Removal Portal
https://cbl.abuseat.org/lookup.cgiImportant Tips
- ●CBL is the primary source for Spamhaus XBL. Getting delisted from CBL will also remove your XBL listing.
- ●If you get relisted within hours, your server is still compromised. A full malware scan and possibly a fresh OS install may be needed.
- ●Check for compromised WordPress, Joomla, or other CMS installations — these are the most common vectors.
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