iPhone 3G v2.1 Configured email to a POP3 account. Works OK for a couple of weeks then becomes intermittent and refuses to download some messages. If I delete the email account then re-enter it, it will download the missing emails and works for a few days. All settings on this email account are bog-standard with the exception of the sending SMTP port number. I leave the emails on the server for 3 days to allow Entourage and iPhone to share the same account. I've recently changed ISP and it appears to have happened since then. Has anyone had this problem? Pointers please?