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Postlark

High-quality email verification API.

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Postlark

Overview

A focused email-verification API. Sign up, get an API key, and POST an email to receive a structured validity verdict — syntax, MX, disposable, role-account, free-provider, catch-all, and SMTP reachability checks, plus a typo suggestion when the address looks like a near miss.

Highlights

  • One clear verdict — a structured, deterministic result per address.
  • Deep checks — MX, disposable, role, free-provider, catch-all, SMTP probe.
  • Typo suggestions — recover gmial.com → gmail.com automatically.
  • Simple pricing — a low monthly subscription with bulk plans available.

Example

curl https://api.postlark.io/v1/verify 
  -H "Authorization: Bearer $POSTLARK_API_KEY" 
  -d '{"email":"[email protected]"}'