You can pretty much go with any kind of hosting for a PBEM game, so long as you have a couple of minutes to run the turn (I would say five minutes per turn or so, if everything is ready). If you can think of an hosting pattern, you can use it in a PBEM game. (The game will let you proceed the turn if some turns are missing)
OK, thanks for the replies. I will start a new thread asking for PBEM players in a 5 day forced hosting format. Wish me luck, as it will be my first attempt at this.