To configure the synchronization and storage of emails, open the account settings pane in one of the following ways:
•In the Menu Bar, select > Settings.
•In the folder window, select the desired account, right-click the context menu, and select .
In the go to the account menu item .
Select Keep messages in all folders for this account on this computer, if you want all messages to be stored on your computer. Click Advanced and select local folders for storing messages.
1.Select message synchronization settings to save disk space.
2.Select the settings for deleting outdated messages to optimize disk space.