Mail with Multiple POP & Platform

Question

I use multiple pop accounts and multiple platforms to access those accounts. If I access an email from another account (Windows Outlook) I will never see they message appear in my Mac Mail even though it is still on the pop server. How can I get Mail to show want is in that account? It ignors everything that Outlook grabs weather its read or not.
Thank You
G4   Mac OS X (10.4.6)  

Answer 1

This problem with Gmail is "normal" and there is nothing you can do about it. Gmail POP access does not work as a normal POP mail server would:
1. Messages downloaded by any POP mail client are marked as downloaded at the server, and no longer available to either the same or any other mail client.
2. To make already downloaded Gmail messages available for POP access again, you must log into your Gmail account with a web browser and re-enable POP downloading for all your messages, which will cause everything (and I mean everything) still there to be downloaded again.
3. Any "Remove copy from server" account settings in Mail > Preferences > Accounts > Advanced have absolutely no effect on the messages stored on the server. The reason is that, after being downloaded, those messages are no longer available to any mail client, not even to the same client that has just downloaded them, not even for deleting them or checking whether they are still there.
4. Messages created and sent using the web interface will be downloaded by your POP mail client as if they were incoming messages. You can set up a rule in Mail to automatically route those messages to the appropriate Sent mailbox (or to any other mailbox for that matter) if that's what you want. Although this may seem weird, it's good because it allows archiving all messages locally in Mail, regardless of how they were sent -- as long as you don't access the same Gmail account with more than one mail client, that is.
5. Messages created and sent using a POP mail client such as Mail are also treated as if they were incoming messages for POP purposes, just as in 4. What prevents them from being downloaded is that Gmail marks them as already downloaded immediately. They would, however, be downloaded if Gmail settings were changed as described in 2 above.
Does the problem also happen with your other POP accounts as well?