I use my GoDaddy IMAP account so in theory their mail servers should should keep all my mail folders organized, and all my mail apps across all devices should pull the info from the GoDaddy IMAP account server. This system works well with my Win 8.1 laptop using Thunderbird, and it works well on my iPhone 5 and iPad mini Retina using the resident Mail app. Both iPhone and iPad are still running iOS 7. But for some reason the resident Mavericks Mail app seems dysfunctional. It often fails to retrieve all my mail. It goes nuts when I try to use it to cleanup mail folders. So I'm hoping the resident Mail app in Yosemite as way better. I don't use iCloud as I prefer to use my GoDaddy mail server to be compatible with more than just Apple devices.