IP Reputation & Blacklist Checker

See if your server IP has landed on spam or malware blacklists.

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If your server's IP address ends up on a blacklist, the damage is quiet but severe: your emails start landing in spam folders or bouncing, and some networks block access to your site entirely. It often happens through no fault of your own — a previous tenant of the IP, a compromised neighbour, or a single misfire. An IP blacklist checker tells you the moment your reputation takes a hit.

What it checks

Your IP across major spam and malware blacklists (DNSBLs)
Email-delivery blocklists that send mail to spam or bounce it
Reputation changes over time, not just a one-off snapshot
Listings inherited from a previous owner of the IP
Which specific blocklist flagged you, so you can request delisting

Why it matters

Email deliverability and site access depend on a reputation you can't see until something breaks. By the time customers report missing emails, you have already lost messages and trust. Continuous monitoring catches a listing while it is still easy to investigate and request removal.

How BrandSentryPro does it

Add your server's IP and BrandSentryPro checks it against the major blocklists on a schedule, alerting you the moment you appear on one — with the specific list named so you can act on delisting quickly.

Frequently asked questions

Why is my server IP blacklisted?

Common causes include sending mail that recipients marked as spam, a compromised account or script sending out spam, sharing an IP range with bad actors, or inheriting a listing from the IP's previous owner.

How does a blacklisted IP affect me?

Your outbound email may be sent to spam or rejected, and some networks and security tools may block access to services on that IP. It directly hurts deliverability and reach.

How do I get removed from a blacklist?

First fix the underlying cause (stop the spam source, secure the server), then request delisting through the specific blocklist's removal process. Knowing which list flagged you — which a checker tells you — is the first step.