Hello List, I am running : Exchange 2000 SP2 Outlook 2002 SP2 Windows XP SP1 The problem started after applying Office XP SP2 to my clients. Some of the clients, when they send a message, the message stays in Outbox forever. It is not sent. The recipient does not receive the message. Trying to resend the message from the Outbox does not help. However, If I open the problem client's mailbox from another PC that is running Outlook XP, I am able to resend the message. New messages created from the second PC goes fine. If I logon to the same "problem" PC with a different user profile, I donot see any problem, all messages go through fine. Finally, I deleted the "problem" user's Windows profile under c:\documents and settings, and the user logged and created a new profile. After that the problem has vanished. However, this has happened to 2 users so far. Any ideas, any one else has seen similar problems ? Thank you for any inputs. Regards, Raj