I download files from wowace and curseforge for years now. My real-time notifications are set for dozens of projects and I receive many e-mails per day for newly updated files. I don't and will not use the curse client, I enjoy the manual way to update my addons, so this issue is not only for the curse app.
Since the new sites are up I still receive the emails correctly but the projects have not been updated on the project pages and I can't download the new addon versions. An example:
Sorry for this, you should stop seeing these messages. We had to reprocess the new files a few times to make sure they were syncing to the client properly and it inadvertently triggered these emails to fire off.