Why does community email keeps coming?

I unsubscribed only one group that I joint before to ask a question(meaning that I don't join any group)

I unchecked every items on notification.

But why does community email keeps coming to my email account?

This happens, from yesterday(Sudden and unexpected issue).

Please, help me. It's annoying.

PS. FYI, I don't have 2nd account. And I know how to move unwanted email to trash folder or other folder automatically on any email services.