If you want Evolution to check automatically for new messages, click the
Select "Use Quick Resync" if the IMAP server supports IMAP4 Extensions for Quick Mailbox Resynchronization.
You can also define if Evolution checks for new messages in all folders, or only in subscribed folders.
Select
Select if you want Evolution to use custom commands to connect to the IMAP server.
Select if you want Evolution to show only subscribed folders.
Select if you want Evolution to override server-supplied folder namespaces.