Mail app won't auto sync

My mail app won't auto sync in Windows 10. I am logged in with my windows ID but my mail I primarily use is from my ISP. So I set it up and all emails came through, it works. Apart from auto sync, I have it set to every 15 mins but it doesn't do it. If I launch the mail app later on it won't automatically pull in my new emails, I have to force a manual refresh all the time. I have changed the sync settings about but nothing makes it work. I googled around and some suggestions were to ensure privacy settings looked correct, which they are. Am I missing something obvious here? The mail app works but only on a manual refresh basis. Seems buggy to me

Cheers, Wayne

Yep the sync settings just don't work on any email accounts in the mail app and as a result the calendar app. I can open mail app up and force a manual refresh/sync which will also update the calendar with entries I make remotely or via phone but the regularity of checks is not working. Do others see this? The same happens on my outlook.com acc and my BT internet ISP account. It kind of makes the lives tiles redundant as the actual apps will only sync manually.