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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
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
- Check Supabase email templates — Go to Supabase dashboard → Authentication → Email Templates and verify the confirmation URL uses {{ .ConfirmationURL }}
- Verify redirect URL configuration — In Supabase dashboard → Authentication → URL Configuration, make sure the Site URL and Redirect URLs include your production domain
- Extend token expiry — Increase the email OTP expiry in Supabase Auth settings if users complain about expired links
- Handle the auth callback — Ensure your app has a route that handles the auth callback and exchanges the token for a session
- 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.
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
hanson1014
Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround.
BurnHavoc
Been around fixing other peoples code for 20 years.
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 : )
Matthew Jordan
I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Nam Tran
10 years as fullstack developer
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
🖋️ Sharing insights through technical writing, blogging, and open-source contributions.
🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences.
Notable Achievements:
🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
🌟 Open source contributions on Github & StackOverflow for Flutter & Dart
🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
Stanislav Prigodich
15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently 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.