Consider this situation:
Alice writes a PM to Bob. Then, Alice invites Charlie to the conversation using Charlie’s mail address, because Charlie has not yet an account.
I expected that Charlie gets a mail with all former content and can reply by mail. I also expected that Charlie receives, once it accessed the web page to accept the invitation, all further replies to the PM until Charlie hat created a full account by setting a password.
I thought this would be the behaviour of users writing to topics per mail that allow anonymous (staged) users.
Is there a setting or which workflow allows so far to have conversations with many people only known by mail that do not want to care for a full account?