Auth0 Error Occurs When Populating Email Template Redirect To Field
Apr 13, 2026
Overview
When configuring an email template in a free Auth0 tenant, an error occurs when populating the Redirect To field because Auth0 requires a verified custom domain. Resolve this issue by adding a custom domain to the tenant and updating the email template.
Auth0 generates an error when a user attempts to populate the Redirect To field in an email template:
Error! There must be a verified custom domain to perform this operation
Applies To
- Auth0
- Free Tenants
- Email Templates
Cause
For free subscription plans, Auth0 requires a verified custom domain to use the Redirect To field in email templates due to a security update. Older tenants might not experience this requirement.
Solution
What steps add a custom domain to resolve the email template error?
To resolve the error, add a custom domain to the free tenant from the Branding menu and update the email template.
- In the Auth0 Dashboard, navigate to Branding > Custom Domains.
- Select Add Custom Domain, enter the required data, and select Save.
- Navigate to Branding > Email Templates.
- Update the Redirect To field in the email template.
