Optionalconnectionconnection state.
Notifies the subscriber of a created EmailMessage.
created EmailMessage.
Notifies the subscriber of a deleted EmailMessage.
deleted EmailMessage.
Notifies the subscriber of an updated EmailMessage.
updated EmailMessage.
Notifies the subscriber that the subscription connection state has changed. The subscriber won't be notified of
EmailMessagechanges until the connection status changes toConnectionState.CONNECTED. The subscriber will stop receivingEmailMessagechange notifications when the connection state changes toConnectionState.DISCONNECTED.