Sniffmail – Email verification API that catches fake signups

Summary: Sniffmail verifies email addresses at the SMTP level without sending emails, detecting disposable addresses, full inboxes, and catch-all domains in a single API call. It integrates via npm or REST API, providing accurate mailbox existence checks before signups.

What it does

Sniffmail connects to mail servers to confirm mailbox existence, detect temporary or disposable emails, flag full inboxes, and identify catch-all domains without sending any email. It offers a developer-friendly API accessible through npm or REST.

Who it's for

Developers and teams needing to prevent fake or disposable email signups and maintain sender reputation by verifying emails before they enter their systems.

Why it matters

It prevents fake signups and bounces by verifying emails without sending messages, reducing spam risk and improving data quality.