emailval — Email Validation API: Email validation API — 10× cheaper than ZeroBounce

Hey Product Hunt! 👋 I'm Dmytro, the developer behind emailval. The problem: email validation APIs are expensive. ZeroBounce charges $0.008/email, NeverBounce $0.007. If you're cleaning a list of 1 million addresses, that's $8,000. Most of that cost isn't justified by the underlying work. So I built emailval — a five-layer validation pipeline at $0.0008/email. Ten times cheaper. How it works technically: Layer 1: RFC 5321/5322 syntax check (<1ms, no network call) Layer 2: Async DNS MX lookup with Redis caching Layer 3: Checked against 350,000+ disposable domain blocklist (updated weekly) Layer 4: Catch-all detection via SMTP probe with random UUID address Layer 5: Full EHLO → MAIL FROM → RCPT TO handshake — no email is ever sent The result is a deliverability score 0–100. 100 = mailbox confirmed. 60 = valid but provider (Gmail/Outlook) blocks SMTP verification. 20 = disposable or catch-all. 0 = invalid. Self-serve: pay with Stripe → API key arrives by email in seconds. No sales call, no trial form. Happy to answer any technical questions about the SMTP layer or how I handle catch-all detection. It's more interesting than it sounds 🙂