Cannot Edit Masked Email Entry

Hey @AndrewParker ,
Thanks for the valuable feedback here.

Sorry you had to research this topic beyond our documentation. This integration with Fastmail currently indeed only works for new signup pages and new login items, and questions or important pieces of information such as Fastmail's limitations should be found on Fastmail's support, as we're sort of a middleman that delivers new masked emails from them to you and have no impact or say on such matters.

However, I can definitely see how such information might be helpful for some users directly on our website, I'll forward your request to the team.
Thanks again for bringing this up.