Related to User Email Address:

User Settings - Help for user's setting their own personal options on SITO, such as name, email address, home page, copyright, etc.

Viewable Settings - Describes what 'public' and 'private' mean relative to User Settings

Discussion Notification - Explanation of Discussion Notification for User Settings

Usage of user information submitted - Outlines the SITO policy on confidential (and other) information that a user gives to SITO.