Looking at mw:Special:Preferences#mw-prefsection-personal, currently "Email options" is under the "User profile" tab of mw:Special:Preferences. I think "Email options" should be moved to a separate "Notifications" tab in MediaWiki core.
This will allow third-party extensions (such as Echo) to more easily add their preferences to a dedicated, sensible section of Special:Preferences.
See Also: