On 24.10.2010, at 18.46, Michael M. Slusarz wrote: >>> Wouldn't a client that keeps local copies of all IMAP boxes then >>> synchronize to that canned state, i.e., delete all locally cached >>> mails? >> >> I'm pretty sure they will. I'm not aware of any good way to handle >> this, other than ALERTs. > > Isn't this the exact reason to return the UNAVAILABLE response (RFC 5530)?
Yeah, but that's a pretty new RFC and I don't think there are many (if any..) clients that support it. Still, it is what Dovecot uses for reporting "internal authentication failure".
