My cousin has a Laptop that is running Windows XP and Outlook 2007. When she's using other internet connections aside from her home wifi everything works fine. I logged in and checked out her router and there's no ports or any special settings that I could that might cause an issue. I'm not entirely sure what I should be looking for aside from blocked ports. Has anyone had this issue? Could there be a setting in Outlook that could be a fix?
If your cousin's laptop has outlook configured to use at her work or school, it might have been configured to user that location's outlook exchange server on that local domain or at an IP address that is not externally available. Verify that the outlook send/receive settings are to external addresses. If that is ok, verify the router assumption by trying to connect to outlok at another location (an internet cafe).