I have been having a problem with my mail on my previous 6 on iOS 10 as well as my new iOS 11 in that I can’t seem to get my mail to automatically push the messages though. I have to open the mail app and that then reloads and downloads all of my current emails. When I look in the settings, the mail option is set to push. When I open the individual account settings, most of them are set to “fetch” and “push” isn’t an option for any of my emails except for iCloud and my Hotmail account. Any ideas?