By default, any e-mails are assumed to be for Amedeus (but may be passed around and shared with the others). If you want to, for whatever reason, send something to anyone else on the People page, put it in the the title bar, like so:
"Wizardmon5: You're a giant, steaming pile of gay"
or
"Leus: u suk"
We hope this helps to avoid any confusion in the future, that probably wouldn't have arisen either way because nobody's ever going to e-mail us at all.