Why “unknown” is the most honest answer we can give

Inflating results with a guessed “valid” hurts your deliverability. We return a confidence score and admit uncertainty instead.

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Why this matters

Email verification only helps if it's honest. Throughout the CorrectInbox product we return a confidence score and admit “unknown” when a catch-all genuinely can't be resolved — rather than inflating results with a guessed “valid.”

That same principle shapes how we write: practical, specific, and free of the deliverability myths that make lists worse, not better.

Put it into practice

The fastest way to understand verification is to run your own list through it. Start free with 100 verifications — no card required.