Official Email Validator

What it does

A lightning-fast, production-grade API to verify emails with syntax checks, MX lookups, disposable detection, and real-time SMTP validation. Ideal for signups, email lists, fraud prevention, and zero-bounce workflows.

This Email Validator API provides a fast, production-grade way to verify the authenticity and deliverability of email addresses. It performs a multi-step validation process, including: - Syntax check: Ensures the email is correctly formatted. - MX record lookup: Confirms the domain is capable of receiving email. - Disposable email detection: Flags temporary email providers like mailinator.com or 1

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  Email Validator by SidemailFeb 2026 · sidemail.io · ▲16

  Hi HN – Kristyna here. I built this free, online email validator and would love to share it with you. What it checks: - Syntax – Confirms correct proper email format. - Domain & DNS – Verifies the domain exists and resolves. - MX records – Verifies the domain can receive mail. - SMTP handshake (optional) – Checks the mail server accepts the recipient (no message is sent). - Disposable domains – Flags temporary inbox providers that can hurt deliverability lists. - Common typos – Catches mistakes and suggests fixes. How it works: Paste an email > click Validate > get a clear result with…

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