Hello,
I have cyrus-imap running on linux and appr 70 win98 client machines with outlook 2000. I'm not quite sure wether its outlook or imap server problem. I have tracked down that sometimes when outlook is running and after message arrives to imap server , outlook is unable to get message from server (Send&Receive preforms its action but delivers no new messages). Although reading message same time with some other imap client shows that message is there. When I close outlook and rerun it works fine again. Btw, most of the time it deliveres messages immediately.. I have seeked lot but find nothing yet, maybe someone here has experienced that kind of problem and knows answer?