Index: src/wp-admin/user-edit.php
===================================================================
--- src/wp-admin/user-edit.php	(revision 42426)
+++ src/wp-admin/user-edit.php	(working copy)
@@ -507,6 +507,7 @@
 		</p>
 		</div>
 		<?php endif; ?>
+		<p class="description"><?php _e( 'If you change this email we will send you an email at your new address to confirm it. The new address will not become active until confirmed.' ); ?></p>
 	</td>
 	</tr>