But it should really be forced hosting - with 17 players, I doubt a week would go by without someone asking for a delay. The _bad_ thing about pbem is that people send the wrong files - though if people used good email programs like Pegasus that wouldn't be such an issue, since it keeps track of recent directories / files used for attachments. Hard to send the wrong file when the program shows the right file to send.
Shame the latest versions of Thunderbird still don't have something like it - really makes PBEM games so much simpler.