> And Feizhou, who seems to be towing your line, has already admitted he > has no idea about Cyrus and has never used it. > Well, cyrus does add extra things to do according to its documentation. /var/imap needs to be infallable for cyrus to be trouble-free like the courier or dovecot. cyrus-imap adds this as a possible source of trouble whereas dovecot and courier-imap only have to worry about the actual mailboxes (assuming maildir, courier-imap only supports maildir) which are basically a structure of directories and files.