To get to the Welcome Page:
Click Email folder in the upper left-hand pane, at the top of your folder list. The Welcome Page appears. You can navigate in Web Messaging by clicking the links on the right-hand side of the Welcome Page, or by clicking the corresponding icons (Address Books, Rules, Preferences) at the bottom of the left-hand pane.
The table at the top of the page shows a current listing of all mailboxes with the following column information: Size, Unread Count, and Total Messages.
Total Mailbox Size is shown below the list of mailboxes, this is the combined size for all mailboxes for this user.
If there is more than one page of mailbox entries, the slider bar displays to allow paging through the entries.