The only other possibilities users have of looking at e-mails, is through the
partner object, or other objects mails are directly linked to. This makes it
impossible to get an overall view, or to search through mails.
Furthermore the module makes newly received mails stand out with a red circle
in the mail view. These mails are in need of action. Via a simple click a user
can either mark a message as also in need of action, or the other way around,
as having been handled.