Notification that confirmation mail was sent may be out of view
... including users with old eyes and insufficient prominence of notification.
When I added a new email address in accounts/profile/, the notification that mail had been sent was posted near the top of the page. It seemed to me that nothing had happened. I know enough to look, did look, and found it. But I think it would be better for such notifications to be posted near the input area that triggers them. For the current profile screen, near bottom of page would be OK.