Introduction - Relaybase

Relaybase is an email validation API that checks whether an email address is real and deliverable before you send to it catching typos, disposable domains, role-based addresses, and undeliverable mailboxes before they hurt your sender reputation and bounce rate.

Quickstart

Make your first API request in a few minutes.

Validate an Email

See the full single-validation request and response reference.

Validation Results

Understand how Relaybase classifies and scores an email.

Plans & Usage

See what’s included on each plan.