Layered email validation: beyond regex with disposable detection, typo suggestions, and MX checks

Short summary

Regex-based email validation gives false confidence by checking syntax shape while missing disposable domains, typos, and missing MX records. A layered approach—syntax check, disposable/role detection, typo suggestions, and MX record lookup—catches most bad addresses cheaply before they hurt deliverability or conversion. The author shares a free Cloudflare Workers API that bundles all four checks into a single GET call.

• •Regex validation only checks shape, not deliverability — disposable, typo, and dead domains all pass
• •Layered checks (syntax, disposable, typo, MX) catch most bad addresses at low cost
• •Author provides a free Cloudflare Workers API implementing all four layers

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