Internet Direct (Indy) Version 9.0.1 Beta
TIdMessage.Date
The date a message was sent.

property Date: TDateTime;
Description
Date is a TDateTime property that represents the TDateTime , expressed in the local timezone, when the message was sent. FOr an incoming message, Date contains the value read from the message header "Date:". For an outgoing messsage, Date contains the value written to the message header "Date:", or the current timestamp when UseNowFOrDate is True.