You should be able to via the custom SMTP service. It shouldn't even require a plugin.
Hi, I went trough all admin menus (nodebb 1.7.4) before asking this question but it doesn’t seem like there is a setting to enable email notifications (globally for new users) on signup, replies on posts, etc. I read several topics and saw screenshots of such settings but can’t find them. Test emails work and users can enable email notifications for themselves and that works too however, we would like to have it enabled by default. Please guide me to the Admin area where I can turn this on. Thanks!
Admin > (SETTINGS) User > Default User Settings