Understand verification results

Results are evidence, not a delivery guarantee

Valid indicates a usable positive check; invalid indicates the address did not pass. A valid result never guarantees inbox delivery.

Catch-all domains may accept many addresses, so a mailbox-level conclusion may be less certain. Read the detail before using that result.

Uncertain or incomplete

Unknown means the check could not return a dependable answer. Still checking means no final answer yet. Technical failures and unprocessed items do not create a net verification charge.