Email Deliverability & Fraud Validation
Credits: 1 per call.
Validates an email address for deliverability and risk. Returns the normalized address, deliverability verdict (deliverable, risky, undeliverable), a quality score (0–100), a toxicity score, and a set of boolean verdicts (isFree, isDisposable, isRoleAccount, isFull, isCatchAll, isToxic).
Use this endpoint at signup time to reject typos and disposable addresses before they enter your database, reducing bounce rates on transactional email and fraud signals from throwaway accounts.
riskLevel reference — standardized scoring you can branch on:
| Level | When |
|---|---|
NONE | Mailbox is deliverable and not flagged as disposable or toxic. |
MEDIUM | Domain is catch-all — accepts every address, so the specific mailbox cannot be confirmed to exist. |
HIGH | Deliverability is risky or unknown (e.g. mail server rejects probes), OR the domain belongs to a disposable / temporary email provider (Mailinator, 10minutemail, Guerrillamail, etc.). |
CRITICAL | Mailbox is undeliverable (does not exist or is full), OR the address scores above 40 on the toxicity index (associated with spam / abuse). |
The verdicts object always carries the underlying signals (isFree, isDisposable, isRoleAccount, isFull, isCatchAll, isToxic) so you can apply your own scoring on top if you need finer granularity.
Cuerpo
Respuesta
Validation results (Strict Envelope Pattern).