On Fri, 2011-02-04 at 09:00 -0500, Jerry wrote: > There are several posts questioning what the mailserver does when it > actually receives a NOOP command. Perhaps I can elicited from Timo > exactly what Dovecot does in that situation?
NOOP is a "no operation", so it does nothing itself. But as part of all commands IMAP server checks if there have been any changes to mailbox and notifies about them (new messages, flag changes, expunges). I know Outlook used to become confused about those flag change events when they were sent as a reply to FETCH command, but all server do this checking for NOOP command, so I've no idea what Outlook's problem with it could be.
