ORIGINAL: von Jaeger
I'm a novice at PBEM and I have found it very easy to both send and receive save files.
As for the security thing, if I can't trust my opponent not to cheat, then why bother? It's only a game ([X(] - shock announcement!)
I've never played PBEM but I'm thinking seriously about trying it. I have seen forums where they were talking about it being an issue and just the hint that some one was cheating or getting "favorable dies" was enough to really start some people going after one another. You'd think it was just a game, but some seem to think it more.