In my understanding the approach is based on game theoretic principles that do not extend naturally to more than two players. If that's correct then it's not only a computational issue.
See
http://www.nature.com/news/how-rival-bots-battled-their-way-...
It was a few months ago, so I don't remember exactly, but I believe I followed the instructions that fastmail provided. If you say you didn't have this problem then I will try again.
I have a question about fastmail: I tried migrating from gmail but the original date of the emails didn't transfer. Anyone knows how to solve it?
I had to go back to gmail since it's a deal breaker and I couldn't find a solution, but I really want to leave gmail (so I can have a direct relationship with the service provider without advertisers involve)