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Email Verification Flow Broken in Lovable App

Your Lovable app's email verification flow is broken. Users sign up but can't verify their email because the verification link doesn't work, leads to an error page, has already expired, or the verification email never arrives.

Email verification is essential for preventing fake accounts and ensuring users own their email address. When it's broken, legitimate users are locked out of your app after signing up, creating a terrible first impression.

The issue might be specific to certain email providers, or it might affect all users. Some users receive the email but the link fails; others never receive the email at all.

Error Messages You Might See

Email link is invalid or has expired Error: Invalid token Auth callback error: invalid_grant Redirect URL mismatch
Email link is invalid or has expiredError: Invalid tokenAuth callback error: invalid_grantRedirect URL mismatch

Common Causes

  • Wrong redirect URL — The verification link points to localhost or the wrong domain
  • Supabase email template misconfigured — The confirmation URL template in Supabase uses wrong variables or format
  • Token expired — Email verification tokens expire before users click the link (default may be too short)
  • Email caught by spam filter — Verification emails are caught by spam filters, especially for corporate email addresses
  • Missing redirect handling — The app doesn't handle the redirect after Supabase verifies the email

How to Fix It

  1. Check Supabase email templates — Go to Supabase dashboard → Authentication → Email Templates and verify the confirmation URL uses {{ .ConfirmationURL }}
  2. Verify redirect URL configuration — In Supabase dashboard → Authentication → URL Configuration, make sure the Site URL and Redirect URLs include your production domain
  3. Extend token expiry — Increase the email OTP expiry in Supabase Auth settings if users complain about expired links
  4. Handle the auth callback — Ensure your app has a route that handles the auth callback and exchanges the token for a session
  5. Test the full flow — Sign up with a new email and follow the complete verification path to find exactly where it breaks

Real developers can help you.

Costea Adrian Costea Adrian Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system. prajwalfullstack prajwalfullstack Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help rayush33 rayush33 JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems AUXLE AUXLE I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies. Krishna Sai Kuncha Krishna Sai Kuncha Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : ) Jen Jacobsen Jen Jacobsen I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses. I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain. Victor Denisov Victor Denisov Developer Luca Liberati Luca Liberati I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture Kingsley Omage Kingsley Omage Fullstack software engineer passionate about AI Agents, blockchain, LLMs. David Olverson David Olverson Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.

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Frequently Asked Questions

How long should verification links be valid?

At least 24 hours. Many users don't check email immediately. Supabase default is 24 hours but you can extend it in Authentication → Settings.

Can I skip email verification?

Technically yes — you can disable it in Supabase Auth settings. But this allows fake accounts and makes it impossible to send password reset emails, so it's not recommended for production apps.

Related Lovable Issues

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