If you receive your messages from an IMAP server, you can work in offline mode. You can work in offline mode to reduce the amount of time that you spend online.
When you switch to offline mode, Evolution
creates a local copy of folders that you have selected for offline use. You
can read and respond to the messages in the folders in offline mode. When
you send a message, Evolution
stores the message
in your Outbox folder until you switch to online mode
again.
Offline mode is not the same as being disconnected. Evolution
does not attempt to connect when you work offline. Instead, Evolution
completes all actions that you performed offline when
you return to online mode.
To specify which folders to create copies of when you are in offline mode, see Setting Folders Preferences.
To switch to offline mode, choose File -> Work Offline. Alternatively,
click on the connected cables icon at the bottom left of the Evolution
window. A cross appears through the connected cables
icon.
To switch to online mode, choose File -> Work Online. Alternatively, click on the connected cables icon. The cross disappears from the connected cables icon.