Network connection and disk storage settings.
Connection
–Settings button: configure the application's Internet connection settings.
Offline
–Offline button: configure the application's offline operation settings and actions when connected to the network or disconnected from the network.
Disk Space
–Clear Now button: clear the application's cache on disk.
–Clear cache on shutdown check box: clear the cache when you exit the application.
–Override automatic cache management check box and the maximum cache size in MB input field.
–Compact all folders when it will save over N MB in total check box.
–Ask every time before compacting check box: enable prompting before compressing folders.
Indexing
–Enable Global Search and Indexer check box.
–Message Store Type for new accounts: File per folder (mbox) or File per message (maildir) list.
–Use hardware acceleration where available check box.