Nine checks, one verification pass.
MX records, SMTP validation, spam trap detection, disposable addresses, role-based mailboxes — caught in a single pass so every send reaches a real inbox.
Nine checks, one verification pass.
MX records, SMTP validation, spam trap detection, disposable addresses, role-based mailboxes — caught in one pass so your sends reach real inboxes.
MX record validation
We query the destination domain's MX records directly to confirm it can accept mail at all.
SMTP verification
Connect, HELO, RCPT TO — a real handshake with the receiving server, without sending anything.
Spam trap detection
Cross-referenced against maintained trap lists so a single bad address doesn't burn your domain.
Disposable address check
Mailinator, Guerrilla Mail, and hundreds of disposable domains flagged automatically.
Role & accept-all
info@, admin@, support@, plus servers that accept everything — surfaced as "risky", not "valid".
Full mailbox signal
Detect over-quota mailboxes that will silently reject mail for weeks on end.
Bulk throughput
Drop a CSV of a million rows; the queue finishes while you're making coffee. No chunking required.
Free API access
Every paid credit works over REST. Verify inline at signup, on form submit, or from a worker.
Detailed CSV export
Every row returns state, reason, MX host, and per-check booleans. No black-box scoring.
Four statuses. No black-box score.
Every address maps cleanly to one of four statuses, plus a reason string and per-check booleans. You segment the list your way.
Deliverable
ValidMailbox exists and accepts mail. Safe to send.
Invalid
BadSyntax error, dead domain, or mailbox confirmed non-existent. Remove from list.
Risky
RiskyDisposable, role-based, accept-all, or full mailbox. Send with caution or suppress.
Unknown
UnknownGreylisted or temporarily unreachable server. Free re-verification when the server responds.
Try every feature on 10 free credits.
No credit card. Verify your hardest addresses and see the accuracy difference.
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