I would recommend DFFD:
http://dffd.wimbli.com/It's the more-or-less official Dwarf Fortress File Depot, and tends to be used for such things.
Passing files by email could be problematic, as DF saved games can grow to 100MB+.
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Timothy Collett
"The only thing you can't trade for your heart's desire...is your heart." "You are what you do. Choose again, and change." "One of these days, someone's gonna plug you, and you're going to die saying, 'What did I say? What did I say?'" ~ Miles Naismith Vorkosigan
