🚫 Blacklist Check
The Blacklist Check tool scans your public IP address against multiple DNS-based blacklists (DNSBLs). These databases track IPs known for sending spam, hosting malware, or other abusive activity.
What it does
The Blacklist Check tool scans your public IP address against multiple DNS-based blacklists (DNSBLs). These databases track IPs known for sending spam, hosting malware, or other abusive activity.
How to use it
On the IPChecks homepage, click the Blacklist Check card and press “Check My IP”. The tool tests your current public IP against major DNSBLs such as Spamhaus, Barracuda, SpamCop and AbuseAT, then reports whether each list is clean or lists you.
Real-world example
If your company emails suddenly start landing in spam, run a Blacklist Check on your mail server's outbound IP. A red entry on one of the lists explains the delivery failures — you can then fix the root cause (a compromised device sending spam) and follow the list's delisting procedure.
Frequently Asked Questions
What does it mean if my IP is listed?
It means one or more DNSBLs flag your IP for abuse. This commonly causes outgoing email to be rejected and can lower your network's trust score. Each list publishes its own delisting steps.
Why might a clean home IP still be blocked?
Some blacklists cover entire IP ranges used by consumer ISPs or VPNs, not just individual offenders. In that case the block is shared and usually resolved by the provider or by using a different egress IP.
Does a clean result guarantee my email is delivered?
No. A clean IP is necessary but not sufficient — proper SPF, DKIM and DMARC records and a good sender reputation also matter. The Blacklist Check only confirms you are not on the major abuse lists.