On Mon, 2007-03-26 at 19:16 +1200, Karl von Randow wrote:
IMAP: 18:26:50 [tx] 0uaw UID FETCH 119071:* (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER] INTERNALDATE) IMAP: 18:26:50 [tx] dftr UID FETCH 17703 (UID FLAGS BODY.PEEK[] INTERNALDATE) .. IMAP: 18:30:52 [tx] dkfx UID FETCH 119071:* (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER] INTERNALDATE)
Note the UID FETCH 119071:* command. Outlook thinks the latest UID it has seen is 1190710, so it tries to fetch new messages with that command. It doesn't really even want to fetch 11703 here, but because "*" matches the latest existing message (by IMAP spec), the last message is returned sort-of unintentionally.
I think your Outlook has just broken its internal cache. Try recreating the account or clearing the cache if you can figure out how.
Maybe that high UIDs did exist at some point and then UIDVALIDITY changed, but Outlook didn't understand that?