Do I Need to Verify Users' Email Addresses Before My Beta?

Should you make users confirm their email before they can use your app, or is that overkill for a small beta? Turn it on. Verifying email is a few minutes of setup on any modern auth provider, and without it your first real week brings typo'd addresses you can never reach, fake signups, and no way to send a password reset. It is one of the cheapest things you can fix before launch.

Why this happens

When you asked your AI agent for "sign up and log in," it built exactly that: a form that takes an email and a password and creates an account. Confirming that the email is real is a separate step, and you didn't ask for it, so it isn't there. The demo works because you typed your own address correctly. Real users won't. Some fat-finger gmial.com. Some sign up with test@test.com to look around. A few are bots. In every one of those cases the account exists but the email behind it is dead, and you find out only when a reset link or an important notice silently bounces.

How to check

You want to know whether an unconfirmed address can log in and use the app right now.

1. Sign up with an address you can watch, for example a +test alias like you+beta@gmail.com.
2. Do not click any confirmation link. Go straight back to the login screen and try to sign in.
3. If you get in, verification is off. If you are blocked until you confirm, it is on.

You can also sign up with an address that doesn't exist, like nobody-1234@example.com. If the account is created and active, nothing is checking that mail can actually reach it.

The fix

Most vibe-coded apps use a hosted auth provider, and each has a switch for this.

1. Supabase: Authentication, Providers, Email, turn on Confirm email. New signups then land in an unconfirmed state until they click the link.
2. Firebase: after createUserWithEmailAndPassword, call sendEmailVerification(user), and gate the app on user.emailVerified being true.
3. Clerk / Auth0 / similar: enable the email verification (or "verify at signup") setting in the dashboard. It is usually one toggle.
4. Set the sender before you launch. Provider default email often lands in spam. Point it at a real domain through your own sender (Resend, Postmark, or the provider's SMTP settings) so the confirmation actually arrives.
5. Test the full loop: sign up, receive the mail, click, confirm you can now log in, and confirm an unconfirmed account still cannot.

Keep the gate itself gentle. Let people reach a "please check your inbox" screen after signup rather than a dead end, and give them a resend button, because the first mail sometimes gets lost.

The trap to avoid

Do not block signup on verification and then forget to configure the sender. The worst version of this is real: users sign up, the confirmation email never arrives (or lands in spam), and now nobody can get in, including the paying beta tester you personally invited. Verification without deliverable email is worse than no verification at all. Send yourself the mail from a fresh account before you tell a single real user the app is ready.

Where this fits

Email verification is a small gate that quietly protects everything downstream: password resets that reach a real inbox, launch announcements that don't bounce, and a signup list that isn't half junk. It pairs with stopping fake accounts and adding a password reset flow before anyone shows up. If you are still deciding how people sign in at all, see Google login or email and password for a beta. The free Readiness Report checks your live auth setup and tells you whether an unconfirmed account can walk straight in, and the Finishing Pass hands you the fixes in order.