Also, in 2k if you have the assistant running, a box will appear stating the sender is requesting a return receipt. If so, then you can click yes or no. I believe that it is sent back to the sender as unread.
Also, depending upon the version and depending upon your connection type the return receipt will be in the outbox until sent.
Exchange server connection-not a chance of seeing it.
Cable or DSL depends upon the imcrements that outlook checks and sends mail. Dialup you can always see it until you press send and receive. JBead