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 checkbox: clear the cache when you exit the application.
–Override automatic cache management checkbox and the maximum cache size in MB input field.
–Compact all folders when it will save over N MB in total checkbox.
–Ask every time before compacting checkbox: enable prompting before compressing folders.
Indexing
–Enable Global Search and Indexer checkbox.
–Message Store Type for new accounts: File per folder (mbox) or File per message (maildir) list.
–Use hardware acceleration where available checkbox.