You should get an email that contains my reply notification.
There is nothing wrong with your account that I can see. No one else has complained about not getting email notifications. I've been getting them all day.
When you have email bouncing issues then we will sometimes turn off your subscriptions but your account show no previous issues. I can't reset your subscriptions to old posts, just clear or turn them off for old posts.
Let me know if you get a notification for this post.