You can see the map in a QB.
Select your units. Save the game. Load the game. Enter Bogus password. Purchase Bogus Units. Save the game. Load the game. Enter Setup Mode.
You can see the map before you ever send the first email. For some reason, CM generates the map on the initial load, well before anyone sees it.
I don't use this tactic, but was playing around to test the limitations.
I think it would make more sense to generate the map after both passwords are set, before either player has seen the map (after both players have selected units)
back on topic:
1 vote for playing the 1st generated map