e message will remain in the outbox.</P>
<P>
Following the commitment of the message data, the destination machine's transport driver will store the message in the inbox. Again, if the descriptor cannot be committed to disk, an error will propagate back to the sending Mailbox library. Only when the message descriptor is safely stored will the remote transport driver indicate the message has been successfully transmitted.</P>
<P>
When the receiving machine has accepted the message, the sending machine will d