When an event (for example, an e-mail message) is received at a server it
is saved into a log file (or a summary is saved). The log entry for each
message includes a set of groups within an organization to which the
message is considered to belong. An administrator who has authority over
any one of those groups is allowed to view this message. When an
administrator logs onto the system it is determined which group or groups
the administrator owns, i.e., for which groups the administrator has the
authority to view their e-mail messages. For each e-mail log entry it is
determined whether there is a group in common between the set of groups
stored in the log entry and the groups that the administrator owns. A
group in common indicates that the administrator is allowed to view that
particular e-mail message.