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.
Free with a Brainito account. No credit card required.
example.com
ExampleAuthentication set up, policy is lenient
- SPFValid
- DKIMFound
- DMARCp=none
- BlacklistsNot listed
Example result with sample data. Yours uses live data for your inputs.
How it works
From your input to a prioritised list of fixes in under a minute.
- Step 1
Enter your details
Your website, business or the item you want checked. Nothing to install.
- Step 2
We run live checks
Brainito fetches live data and tests it against the rules that matter.
- Step 3
Fix what matters first
Clear results with what to fix, in order of impact, and where to go next.
What you get
What the result tells you, and why it is worth the minute it takes.
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.
The guide
What the blacklist checker does, how to use it, and what to do with the result.
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
Something else? Email support@brainito.com
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.
Where to go from here
The blacklist checker answers one question. These are the next ones worth asking.
Check the major email blacklists for your domain in one scan
One account unlocks the blacklist checker plus 320+ marketing tools, weekly audits and your action plan.
- Free with a Brainito account
- No credit card required