Keycloak provides built-in email templates based on FreeMarker and a simple SMTP configuration, which works fine for small deployments.
However, in enterprise environments where email templates are centrally managed through a dedicated CMS or marketing system, maintaining separate FreeMarker templates quickly becomes unmanageable.
In this session, we’ll explore architectural approaches to integrating Keycloak with external email services — from SMTP relays to custom SPI extensions and event-driven designs — enabling a unified, brand-consistent email experience without duplicating templates.