The thing is, it isn't just a problem withe phone at all. Even Thunderbird reports a similiar problem. No matter what I set it to download, new messages or all messages, if I receive a message and read it through gmail's web interface first, this rendering it "read", Thunderbird absolutely will not download it under any circumstances.
I have gone into my gmail settings and enabled pop3 downloading for all messages received at any time, even already-downloaded messages. Yet if I check for new mail with Thunderbird, and a message has already been read on the web interface, it reports "no new messages on server" and does not download anything.
Gmail has actually ackowledged this known issue with their own server software, and is supposedly working to fix it. I guess some mail clients are less susceptible to it than others, but it's definitely a Gmail-side issue.
I have gone into my gmail settings and enabled pop3 downloading for all messages received at any time, even already-downloaded messages. Yet if I check for new mail with Thunderbird, and a message has already been read on the web interface, it reports "no new messages on server" and does not download anything.
Gmail has actually ackowledged this known issue with their own server software, and is supposedly working to fix it. I guess some mail clients are less susceptible to it than others, but it's definitely a Gmail-side issue.