Know which emails deserve a send.
Upload a list and get evidence you can act on: valid, invalid, risky, or unknown. No subscription. No invented certainty.
From messy CSV to usable decisions.
Choose the email column
Upload CSV or TXT. Preview the rows and map the right column before anything runs.
Layer evidence
Syntax, DNS, MX, role, disposable, catch-all, and mailbox responses are evaluated without sending an email.
Keep the context
Download the original columns with clear status and reason fields added to every unique address.
“Unknown” is a feature, not a failure.
Some mail servers intentionally hide mailbox status. We preserve that uncertainty instead of quietly turning it into a false “invalid.”
Valid
The mailbox was accepted and no major risk signal was found.
Invalid
Bad syntax, no usable mail route, or a definitive mailbox rejection.
Risky
Deliverable-looking, with a catch-all, disposable, or role-address signal.
Unknown
The server timed out, greylisted, blocked probing, or gave an inconclusive response.
50 free. Then $5 per 1,000 emails.
No monthly plan. No expiring credits. No charge for duplicate rows.
Clean the list before the list cleans out your reputation.
Create an account, upload a file, and use the 50 included credits. You won’t be asked for a card.
Validate a list