This article details how a global or domain administrator can set up what information a normal user can access regarding messages sent to and from their email address that are passed through the SecurityGateway server.
From the Dashboard, after logging in:
Click on Setup/Users in the lower-left corner
Locate the Mail section
Click on Quarantine Configuration
You may then configure what the default options are for users in regards for how SecurityGateway processes mail that it rejects: if it should quarantine it so it can be reviewed later, or sent on to the domain email server after marking it as spam. More information on these settings can be found in KBA-01877, referenced below.
You may also set up whether users can access their personal quarantine folders or change their quarantine settings for their personal address. By default, these options are enabled.