The SmtpMessageDataChunkSentEventArgs type exposes the following members.
Gets the number of bytes sent to the server during the operation which raised the current event.
Gets the length (in bytes) of the message data being sent.
Gets the mail message which is being sent.
Gets a reference to the object which was supplied by the developer in state parameter of asynchronous methods of the mailer components.(Inherited from CommonEventArgs.)
Gets the total length (in bytes) of the already sent data of the message currently being sent.