Well, to answer that basic question... Yes.Anyone? Let me try this...has anyone successfully used POP/SMTP e-mail via WiFi?
I have accounts at four different ISPs (don't ask). One is an Exchange server, one is IMAP, and the other two are POP3+SMTP. Three of them worked fine via the built-in auto-configuration and the other one required some tweaking (not wifi related) to get it to work at all. I just ran a quick check and all four work work fine via my house WiFi and 3G.
The WiFi router I use is a NetGear Rangemax G and I haven't had to make any special adjustments to make it work with my Eris.