Free Email Blacklist Checker: Know Before Deliverability Drops
Scan the major email blacklists for your domain in one pass and see exactly where you are listed, before inboxes go quiet. Results in seconds.
All Major Lists Checked
One scan covers the widely used blacklists that mailbox providers reference, so nothing slips past you.
Catch Issues Early
Find a listing before open rates crater, so you can request delisting while the damage is still small.
Clear Next Steps
Each result explains what a listing means and what to do about it, so you are not left guessing.
A blacklist checker tells you whether your sending IP or domain appears on the DNS blocklists that inbox providers use to filter spam. A single listing can send your emails to junk folders or block them entirely. This free tool scans your address against major blacklists, showing where you are listed so you can request removal, fix the underlying cause, and protect your email deliverability before more messages get lost.
What the blacklist checker scans
The checker queries your IP address or sending domain against a wide list of DNS-based blocklists, the same databases spam filters consult before accepting mail. These blocklists track sources tied to spam complaints, malware, open relays, and suspicious sending patterns. In a single lookup, the tool reports which lists include your address and which return clean, so you get a complete deliverability snapshot rather than checking each provider by hand. Some blocklists carry more weight with major mailbox providers than others, and the results help you tell a minor listing from one that can seriously damage inbox placement. That clarity tells you where to focus first.
How to read results and get delisted
Start by identifying which blocklists flagged you and how influential each is with major providers. For every listing, the operator usually explains the reason and the removal steps, so visit that blocklist directly. Before you request delisting, fix the root cause, whether that is a compromised account, a misconfigured server, poor list hygiene, or a spike in complaints, because removal will not hold if the behavior continues. Submit removal requests through each blocklist's process and allow time for the change to propagate. After delisting, warm up your sending gradually and monitor complaint rates. Re-run the checker periodically so a fresh listing never goes unnoticed and quietly erodes your deliverability again.
Why blacklist status affects deliverability
Mailbox providers lean on blocklists to decide which mail to accept, filter, or reject, so a listing directly shapes whether your campaigns reach the inbox. Even a strong sender reputation cannot fully offset a listing on a widely used blocklist, and the impact compounds as more messages get diverted or bounced. Being listed also signals a deeper problem, such as compromised credentials or weak list practices, that will keep hurting results until you address it. Checking your blacklist status regularly protects the deliverability that every email metric depends on, since open and click rates mean little if messages never arrive. Staying clean keeps your sending reliable and your reputation intact.
Frequently Asked Questions
Which blacklists does the checker scan?
It checks the major public DNS-based blacklists that mailbox providers commonly reference. You see a clear listed or clean status for each one from a single scan, so you know exactly where your domain stands.
What should I do if my domain is listed?
First stop the behavior that triggered it, such as sending to stale lists. Then follow each blacklist's delisting process. Most accept removal requests once the underlying issue is fixed, and the tool points you to where to start.
Is the Blacklist Checker free to use?
Yes. It is free after you create a Brainito account. Run a scan whenever you like, and it is smart practice to check before any major 2026 email campaign so a hidden listing does not sink your send.
Check the major email blacklists for your domain in one scan
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