Recipient.TrackingStatus (Outlook)

Returns or sets an OlTrackingStatus constant indicating the tracking status for the recipient. Possible return values are olTrackingDelivered - The item has been delivered to the recipient, olTrackingNone - No tracking information is available for the recipient, olTrackingNotDelivered - The item has not been delivered to the recipient, olTrackingNotRead - The item has not been read by the recipient, olTrackingRead - The item has been read by the recipient, olTrackingRecallFailure - The sender of the item attempted to recall the item but was unsuccessful, olTrackingRecallSuccess - The sender of the item recalled the item, olTrackingReplied - The recipient replied to the item.

Session.CurrentUser.TrackingStatus = olTrackingDelivered