Is sufficient for the server to send unsolicited UIDVALIDITY, UIDNEXT, EXISTS, RECENT, and UNSEEN messages (as if the client had re-selected the mailbox) or will that just confuse existing clients
Some clients will have code to handle it. That code will be largely untested, since this hardly if ever happens.
Do you really want to rely on untested code to work?
and it should just close the connection with some appropriate text in the untagged BYE?
Since wu-imapd sends BYE on (some) mailbox selects, the clients' ability to handle a surprising BYE will be fairly well tested.
Arnt
