Inside your product
Stop bad addresses at the door of your own app.
If the address is collected in your signup, CRM, or script, verification belongs there — not in a CSV three weeks later. Same statuses. Same refusal to guess Valid.

You send an address. We run a mailbox probe. You get Valid, Invalid, Risky, or Unknown — plus why — and your app decides whether to accept, reject, or review.
Single verify can wait for a result in one request when API access is on the account. Bulk stays a job you poll. We do not pretend every workspace has keys turned on today — create an account and we’ll meet you where the product actually is.
Why this classification exists · Pricing · Evidence on Trust