/// The has been disposed.
///
/// The is not connected.
///
/// The is not authenticated.
///
/// UTF8=ACCEPT needs to be enabled before selecting a folder.
///
/// The IMAP server does not support the UTF8=ACCEPT extension.
///
/// The operation was canceled via the cancellation token.
///
/// An I/O error occurred.
///
/// The server replied to the ENABLE command with a NO or BAD response.
///
/// An IMAP protocol error occurred.
///