If I remember rightly SE IV doesn't use a hosted pbem, players pass from one to the next?
Stars! and Dominions 2 work very well on pbem because you send your turns to a host who then gens the turns. So a 4 player turn is not delayed as it gets passed from one player to the next.
Tals, SEIV has its own server which, essentially, automates PBEM games. It's slick and painless for players and even a tyro can set up and administer his own game.
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