Is double opt-in (email verification link) enough to stop spam signups in 2026? 📩

Hey Product Hunt! 🙌

A traditional anti-spam strategy has always been Double Opt-In (sending an activation link to the user’s inbox). However, many modern disposable email services give users a temporary inbox instantly—allowing them to click verification links in seconds while still using a fake identity.

This leaves builders stuck choosing between adding heavy CAPTCHAs (which ruin conversion rates) or letting burner emails through.

What is your strategy?

1. Double Opt-In only

2. CAPTCHA on signup

3. Real-time domain & MX API validation

4. Ignored for now until it becomes a problem

Let’s discuss what works best for your apps!

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