Mailu configuration incorrect
According to Mailu's documentation the default URL's for webmail and the admin interface are not subdomains, but are sub directories. https://mailu.io/1.7/demo.html ... shows that the webmail and admin interface are located here (sub directories):
- Webmail : https://test.mailu.io/webmail/
- Admin UI : https://test.mailu.io/admin/
The front
container handles all the routing for Mailu and is running Nginx. The configuration could be overridden to use subdomains, but is more than likely not worth the effort.
Additionally, entry points need to be added to the traefik configuration in order for the email traffic to be routed correctly. Then routes need to be updated within the mailu docker configuration.