We are using microsoft mail for over 200 users (bad, I know…)spread over 7 branches. One particular branch sometimes has problems receiving intranet mail from other people, including their own people at their branch. Error is: The recipient’s Inbox in the postoffice does not exist or is busy. Try sending the message again. If the message cannot be sent, contact your administrator. Most of the time, they can reboot and the problem goes away. Any ideas why it’s just that one branch or why it happens in the first place? I figure if it was a problem with maxing out users, it’d happen to more than just that one branch. It does happen to other branches sometimes, but mostly just this one.