Lets say a watchlist item triggers an email notification.
OK, now exploring https://en.wikipedia.org/wiki/Special:Preferences
the user looks in A and B but doesn't find how to adjust it.
Where could such setting be found, he wonders?
Therefore we see Email options should not be 'hidden' in "User Profile" section, but should be an independent section, or moved into Notifications, or at least be crosslinked...