I've looked but can't find any reference to this. I have my email setup as normal and am using the Samsung app on my S8 to receive mail from one GMail and one IMAP mail account. I have multiple devices. If I get an email I get a notification on my phone and my Gear S2 - so far so good. If I then read the mail on my tablet or PC the notification on my phone doesn't then clear to reflect that I have read that mail, in fact the mail account itself only checks for this once I go into the app. Why doesn't the mail app update when mail is read on other devices and then update the notifications to reflect this? Its irritating having to clear notifications twice when I'm working on my pc!