Catch-all domain resolution
Get a real signal on accept-all domains instead of a shrug.
What it does
Why it matters
Catch-all domains accept mail for any address, so most verifiers can't tell you anything useful. We resolve as much signal as possible and fold it into a quality score, so you can send to the safe ones and hold the rest.
Catch-all domains are where most verifiers give up and mark everything valid, inflating your apparent deliverability. We treat them as their own category and score the risk, so you can send to the safe ones and hold the rest rather than guessing.
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Frequently asked
Why can't catch-alls be confirmed?
An accept-all domain says yes to every address at the SMTP layer, so no verifier can confirm a specific mailbox from outside — the honest result is a catch-all flag, not a false valid.
Should I send to catch-all addresses?
Cautiously — start with engaged segments and weight them lower in your quality score, rather than treating them all as deliverable.
Does the quality score account for them?
Yes — catch-all risk feeds the 0-100 list score so you can set your own acceptance threshold.
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