The emails should all be driven from your choices in your Preferences settings (click your ID in the top bar on the right and select Preferences). It sounds like you have them off. Can you check one more time to be sure you have all the check boxes unchecked for email notifications?
If that looks right then we'll need to know exactly what emails you are getting (i.e. from watched posts/threads, the news emails that get sent, etc.). I assume that these are actual emails and not the alerts that show up under the bell in the right had side of the top bar ( I know - silly question - but gotta ask).
If you still get emails that you don't think you should get we can involve the admins.
Thanks.