We have set up the forum to only email you after an hour of inactivity by default (this may be tweaked in the coming days/weeks/months/years), but you can also control how much, if any email you receive.
By tapping on the image which should represent your profile in the top right, then on the settings cog you end up in settings. There’s an email menu item, and then you can turn on and off email as you choose. By default
Send me email notifications when I am active on this site is off, because if you’re here you’ll see/hear the notification. Feel free to tweak the preferences there to suit your needs (I have the app and use that to check for notifications so have turned all the emails off).