Usually, when someone posts in a thread I have subscribed to, I am notified via email, but lately, this hasn't been happening, so I'm not sure what is going on.
Thanks for raising this. I have also received emails from new registrants who have not received their activation email. Sounds like a potential problem with the email server so i'll investigate.
The email functionality should now be working. This was due to an issue with the web host changing authentication policies and settings on the SMTP server.