Do you get email notifications for categories if you’re following them?
I created a category and followed that category (the instruction said “follow question” but I assume it means “category”).
Then I asked a question and categorized it, but I never got a notification (in-app or by email) letting me know that a new question had been posted using that category. Should I get one?
No.
Subscribed categories are shown in users feed page.
Sending email for every subscribed category will slow down your the whole site. For example, if 500 users are subscribed for a category and a new question posted in that category then AnsPress need to send email to everyone and at that moment your site will slow down.
But if your server is fast then you can easily implement this feature.
Adding this feature in email extension. Will be available with 3.0.0
rahul how to do that?