As a separate issue, the current unsubscribe UX for SSO sites is awful.
When a user clicks an email link, and is not logged in, they are directed to the home page. There is no indication that they need to login, or how to unsubscribe from the emails.
This has lead to numerous complaints from people saying that the unsubscribe links don’t work at all.
I can file this as a separate feature/bug request if that’s convenient?