1. Click the Tools menu and then Options.
2. Click the Mail Setup tab and then click on the Send/Receive... button.
3. This will now open up the Send/Receive options window. Click Include this group in send/receive. Next, click the Edit button.
4. On the left hand side of the Send/Receive Settings window, you will see all accounts that are included in this group. Near the top of the page, you will see the send/receive option for the current account. Ensure that all of the check boxes are enabled.
5. Click OK, then OK again.