How can EiA be played?

Hello All, I’m a total newbie here and I have a problem. I’d like to play an EIA game but it seems it’s impossible. I need to play it by email.
If I open a new offline game I am asked to choose a major, that is obvious. I can create a log file and it’s nice. When I send my log file to my opponent, he has to “load a saved game” and this mean he actually can open my log file and automatically becomes my major (being able to see my corps and so on). What can I do? Thanks for any help.