Microsoft Outlook - Complete a Send/Receive From Anywhere In Outlook (Outlook 2000/2002/2003)
By default, the Send/Receive button is located only on the Standard toolbar when a Mail folder is active. Therefore, when you want to check for new mail or send an item immediately, you probably switch to a Mail folder and click the button. Not necessary! Just press [F9] and to run a Send/Receive.