Cyrus Imap

Though it seems that there are other interfaces available (probably more user friendly ones, using web interfaces etc) the way we can configure cyrus-imap is with cyradm.

See: Cyrus System Administration, Chapter 9 of O'Reilly's "Managing Imap". (Yes, this is so complicated, they wrote whole books about it!)

To start talking to cyradm as the administrator you want to execute (on einstein):

cyradm -user cyrus localhost

and supply the password for the usual password scheme for cyrus.