Many use Exchange Server and surpise, Lotus Notes.
I'm going to write that what you asked in part ii is covered in the courses your admin takes on said systems.
I have some general questions for those who have installed corporate email systems, for small and large firms:
i) are corporate email systems for small firms vastly different from desktop systems?; if so, how?
ii) despite an individual possessing an individual email box(& password presumably), is it possible that these systems, large & small, can be set up so that all the incoming email goes to someone else first ie. private secretary, or departmental secretary?? would this mean that the secretary/departmental secretary has been granted administrator rights?