Internet Mail Control Events  
 
Event Description
OnCancel This event is generated when an operation is canceled
OnDelivered This event is generated after a message has been delivered
OnError This event is generated when an error occurs
OnProgress This event is generated when retrieving or sending messages
OnRecipient This event is generated before a message is sent
OnTimeout This event is generated when an operation is canceled
OnUpdate This event is generated when the server sends a mailbox update notification to the client