Chris January wrote:
The "Add recent messages on top of the list" could easily make the current view inconsistent both in non-threaded mode (e.g. mailbox might be sorted with oldest mails first, but then a new mail arrives and is put at the top of the list), and in threaded mode (same problems, and messages that are part of a thread aren't inserted into the thread).
But if this will be an option user will have a possibility to disable this "inconsistent" behaviour. Now, he can't.
The main benefit of adding recent messages to the top of the list is that you can find them easily. So how about not adding this option, but making new messages easy to discover another way. For example, add a hyperlink above the message table "1 new message", and then clicking on it would select the new message.
I don't know if we need a new feature while we have now a filter with "Unread" position.