The main functionality may come back in the future (messages from your & other's mods discussion threads and mod update notifications) but I can't promise you anything for now.
I just created this service to address the mod portal not having email notifications.
For mod authors:
- Notifications for messages in your mods' discussion board
For all users:
- Notifications for replies in threads you created
- Notifications for new messages in the discussion board of mods your watch
- Notifications for new releases of mods your watch