I'm not sure if this is the right place for this, but since I thought it might be a Thunderbird setting, I posted here.
I have set up both Thunderbird (on Ubuntu 11.10) and Outlook (on Windows 7) to download my gmail emails. Whenever Thunderbird downloads a mail (which hasn't been downloaded by Outlook), Outlook won't download that mail. The mail hasn't been deleted from the server, because I can still see it using the GMail browser app, but it seems like it's marked as "downloaded" and therefore Outlook doesn't want to grab it. Is there a setting to disable this functionality in Thunderbird, or is this something I need to enable in Outlook?