Commands :-
Users:-
ListUsers, who, since, tell, chat		

Messages:-
read, write, new, catchup, next, previous, first, last, reply, skip*

Folders:-
resubscribe, unsubscribe, cd, ls, list, listnew, latest		

Self:-
status, passwd, quit, msg, inform, beep

Misc:-
credits, debits, disclaimer

NB: most commands can be abbreviated to just one or two characters
* only works within 'new'
