Could you specify, what headers and fields should be in the API call to /admin/email/handle_email that creates a staged user and a topic on his behalf?
Also, did I get it right, that such a user will receive notifications for new posts in such a topic and will be able to reply to it via email?
And what happens, if I try to create a staged user and a topic via an API call with an email address that belongs to an active user? Will this topic be created on behalf of such user?