How do I stop getting spammed by UE forum emails

Yesterday I started getting emails at a rate of approximately 5 emails per hour, sometimes up to 10 per hour, for threads that I’m not following. I changed my personal settings to “Never” for emails, but I still keep getting them. I set the “Do Not Disturb” flag but there was absolutely no change. I finally had to resort to telling Google that anything from Unreal Engine was spam to get the emails to stop. What can I change to make this stop?