Base44 auth

Base44 Email Verification Not Sending or Failing on Signup

Users sign up for your Base44 application but never receive the verification email. Some users report that the email arrives but the verification link doesn't work, redirecting to an error page or an expired token message.

This breaks the entire onboarding flow. Users are unable to confirm their accounts and may be locked out of the application entirely. In some cases the email lands in spam folders, but in others it is never sent at all.

The issue may appear intermittently, working fine for some users but failing for others, particularly those with certain email providers like Outlook or corporate email systems.

Error Messages You Might See

Verification link has expired Invalid verification token Email not found
Verification link has expiredInvalid verification tokenEmail not found

Common Causes

  1. The app's email sending configuration has not been properly set up or verified
  2. Verification emails are being caught by spam filters, especially for apps using a generic sender domain
  3. The verification link contains a callback URL that doesn't match the published app's domain
  4. Email rate limits have been hit, causing delays or dropped emails

How to Fix It

First, check if emails are being sent at all by reviewing any available email logs in your Base44 dashboard. If emails are sending but not arriving, the issue is likely spam filtering or the sender domain reputation.

Verify that the callback URL in the verification email matches your app's actual published URL. A mismatch between development and production URLs is a common cause of broken verification links.

For persistent email delivery issues, especially with corporate email providers, you may need a developer to help configure a custom email domain or troubleshoot the specific delivery pipeline.

Real developers can help you.

Daniel Vázquez Daniel Vázquez Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting. Vlad Temian Vlad Temian 15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox). Cursor ambassador and agentic tooling builder. I've scaled systems, automated deployments, and built observability tools for AI coding workflows. I specialize in taking vibe-coded apps from broken prototype to production-ready: fixing Supabase auth/RLS, Stripe integrations, deployment pipelines, and cleaning up AI-generated spaghetti. I build tools in this space (agentprobe, claudebin, micode) and understand both sides: how AI generates code and why it breaks. https://blog.vtemian.com/ Victor Denisov Victor Denisov Developer Franck Plazanet Franck Plazanet I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth. Core Expertise: 🚀 Leadership: Managing and coaching teams of 15+ engineers, fostering a culture of accountability and continuous improvement. 🏗️ Architecture: Enterprise Core Systems, Multi-system Integration (ERP/API/ETL), and Core Database Structure. ☁️ Cloud & Scale: AWS Expert; architected systems handling 10B+ monthly requests and managing 100k+ SKUs. 📈 Business Impact: Aligning tech strategy with P&L goals to drive $70k+ in monthly recurring revenue. I thrive on "out-of-the-box" thinking to solve complex technical bottlenecks and am always looking for ways to use automation to improve business productivity. PawelPloszaj PawelPloszaj I'm fronted developer with 10+ years of experience with big projects. I have small backend background too Taufan Taufan I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms. Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact. Jared Hasson Jared Hasson Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever Omar Faruk Omar Faruk As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience. My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture. I played a key role in creating a scalable and maintainable platform to support educators and learners globally. I'm enthusiastic about embracing new challenges and making meaningful contributions. 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. Tejas Chokhawala Tejas Chokhawala Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript. Focused on performance, clean architecture and shipping fast. Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.

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Frequently Asked Questions

Why aren't my Base44 verification emails being delivered?

Check your email configuration in the Base44 dashboard first. If emails are sending but not arriving, they may be caught by spam filters. Ask users to check their spam folder.

How do I fix expired verification links in Base44?

Ensure the callback URL in your auth settings matches your published app domain. Links may expire if there's a URL mismatch causing a redirect before the token is validated.

Related Base44 Issues

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