...
Google Apps for Education has a feature that enables you to grant access to another user to manage your emails, but not permission to change your account password or settings, or to chat on your behalf. Setting this up will enable the delegated user to read and send email on your behalf.
...
By request from a supervisor, the IT Helpdesk can set up Postini so that a supervisor can the review all inbound email through the Postini Archive website.
...