Cheats find another way...

[Mobhack]

As Don says, and as is already pointed out in the manual, there is unsecure PBEM mode.

See the 4th paragraph of the "Playing by Email" section of the manual for the description of that mode.

An unsecure PBEM will be treated just like a normal save game, except that your opponent is a human and not the AI.

Unsecure PBEM is normally for "hot seat" games on the same PC, but is entirely capable of being played remotely on separate machines. It is saved as a normal save game and not in the secure PBEM slots. (So you will need to zip/unzip to/from saved games directory and not the (secure) PBEM games directory when exchanging files with a remote player).

Use unsecure PBEM if you trust your opponent, or simply do not care if he "cheats", just consider it much like a normal tabletop game at the wargames club with 1/300 or 1/200 models where both sides deploy forces on the same 6 foot by 8 foot table top.

There is no password protection on an unsecured game - since as with the original SP email games the players are free to change preferences, copy, reload and even to rename the game as a scenario and load it into the editor, or load it into a hex editor as the game data is unencrypted, then passwords are quite superfluous. One may as well let such a player load such a game and continue, if he is so inclined to cheat.

However - it is the only PBEM mode that will allow you to play on several different computers (e.g. play on your laptop and your home PC), or to play in several different installations on your own PC.

Cheers
Andy