I upgraded my first-gen iPhone to 2.0, and now the phone won't retrieve Yahoo mail. Oddly, the phone is only showing emails dating back to 6/15. It attempts to connect to the mail server, but never downloads new mail. I've tried powering off the phone, but that didn't work.
Try deleting the old emails from your phone. My phone did the same thing. I have five email accounts that I check...only the first two were displaying emails. They were displaying emails that were still on the email server but I had previously viewed on my phone and deleted from my phone. When I deleted these emails from my phone again, my other emails started arriving.
My iPhone has been "stuck in stupid" several times a day in regards to downloading email since the new software. I've had this happen before...but never several times a day, every day. Anyhow, try turning off the phone for a second and see if that gives your phone what it needs to go fetch those emails.
I'm still having problems with my phone in lots of areas. I wish I'd never downloaded the new iTunes and new iPhone software. Everything was great before that......
I'm having the exact same problem, except I can't get any Yahoo mail past June 12th! However, I'm not experiencing this problem with my Google account. What could be causing this? Is it Yahoo's fault?