Overview
This article addresses an issue where an error page is displayed stating that a link is insecure. This occurs when a user attempts to access resources with links generated by Auth0 and sent through SendGrid.
Applies To
- Auth0 Tenants
- SendGrid Integration
- Custom Liquid Templates
Cause
This issue is caused by SendGrid’s default behavior. When click tracking is active with a custom-branded domain, the tracking uniform resource locators (URLs) it generates will use http:// unless Secure Sockets Layer (SSL) for Click Tracking is specifically configured.
Solution
To resolve this issue, configure SSL for Click Tracking with a content delivery network (CDN) or proxy. See the following Sendgrid documentation for complete steps on performing this action: Enabling SSL for Click and Open Tracking