OK, simular problem here. We have Exchange 5.5 on a Win2K box. Clients run a mix of Win98 and WinXP SP2. On the XP SP2 clients, mail does not send or receive unless you open an email, click a different folder, etc. Windows firewall is turned off but even though it is, I made an exception for it. Still have the same problem, I read somewhere that with XP SP2 the Remote Procedure Call hangs in Outlook XP and is only called when one of the above events happens. It will eventually trigger itself, but I should be able to get the email my boss sends before he gets up and comes to my office to ask me if I have read it yet.
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