Yesterday I noticed my POP3 account wouldn't receive e-mail while at work. When I got home and my phone connected via wi-fi, it received the e-mail just fine. My other apps continued to work yesterday (Facebook, Tweetdeck, etc.). When I got back to work today I noticed the same issue exist. My co-worker who also has an iPhone said the same thing. The issue occurs when on the 3G network, not while just at work....btw. After a long attempt, it displays a message stating it could not connect to the server. Yet again, all other IP services work.