# Diagnose: password reset email missing
## Symptom
"Forgot password" submits fine; nothing lands in the inbox.
## Likely causes
1. Built-in Auth0 email provider: rate-limited, not for production, delivers slowly or not at all under load. Configure a custom provider (SendGrid, SES, Mailgun, SMTP).
2. Spam/junk, or corporate filters eating it. Check the provider's suppression/bounce list: one hard bounce suppresses future sends to that address.
3. Ticket expired or already used: reset links expire (configurable lifetime) and are single-use. Requesting twice invalidates the first link.
4. Wrong connection: the reset was requested against a database connection the user is not on (e.g. user is social-only; password reset is meaningless for them).
## Confirm
- Tenant logs: look for the password reset request and email job events. "Sent" with no arrival = provider/deliverability. No event at all = the request never reached Auth0 (check the app's call).
- Email provider dashboard: bounces, suppressions, deferred queues.
- User Management > the user: which connection are they on? Social-only users cannot reset a database password.
## Fix
Custom email provider, warm it up, monitor bounces. Set the ticket lifetime deliberately (short enough to be safe, long enough for slow inboxes). One active ticket per user; tell users to use the newest email.
## Verify
Request a reset for a test user on the same provider and confirm arrival within a minute, link works once, second click fails cleanly.