On Sun, 2011-03-06 at 20:31 +0000, Ed W wrote: > My best hunch is that there is some shared code in Dovecot to send IDLE > updates every so often and it's hashed on username and IP (I think?),
No, only the "OK Still here" notifications are timed like that. If you have inotify/dnotify/kqueue enabled, Dovecot sends the actual mailbox changes to clients immediately when they happen.
