Manual:$wgEnotifMinorEdits

Details
Set to true to allow email notification for edits flagged as 'minor'. If the editor/poster has the  user right, emails will still never be sent for minor edits. Users still need to opt in by checking the appropriate pref>Special:MyLanguage/Help:Preferences|user preference. User talk notifications are affected by this, .

If   is false, this setting is ignored.