Free tool
Free email blacklist check. Are your domains listed?
Paste your domains — one per line — and check their domain health and sender reputation against the major DNS blocklists in a minute or two. Ten free, up to a hundred with your work email. It's the same check we run on client infrastructure.
Checks your domains against major DNS blocklists plus reputation signals — the same check we run on every client's sending infrastructure.
Why this matters
A blacklisted sending domain quietly kills reply rates — everything looks fine in your sent folder while prospects never see the message. Paste your domains (sending domains especially) and see where you stand in a minute or two.
Why it matters
What happens when a sending domain gets listed?
Nothing visible. That is the problem. Your emails send fine, your tools report "delivered" — and your prospects never see a thing, because providers route listed senders straight to spam. The first symptom is usually just replies drying up.
This checker runs your domains against the major DNS blocklists — the same check we run on every client's sending infrastructure before and during campaigns. Paste up to 10 free; a work email raises it to 100 for agencies and teams with real inventories.
If something is listed: the fix is rarely just a delisting request. It is the practices that caused it — dedicated domains, warmup, managed volume, verified lists. That cleanup is literally our job. And before your next campaign, run the copy through the spam checker too.
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