Email address is optional, but is needed for password resets, should you forget your password.
MediaWiki:Prefs-help-email
From OdaWiki
This page has been deleted. The deletion and move log for the page are provided below for reference.
- 22:35, 16 January 2015 MediaWiki default (Talk) deleted page MediaWiki:Prefs-help-email (No longer required)