Tuesday at about 4:50pm Pacific time our web application at app.simplenote.com went down, displaying a generic 404 error message. We discovered shortly after that Google Cloud Platform, which hosts the web application, had shut down the site due to a DMCA notice for allegedly infringing content that appeared in published notes. We worked with Google to rectify the issue as quickly as possible and they reinstated the app yesterday morning.
No data was lost during this outage. Thanks for your patience as we get everything up and running again! You may see some delays in sharing or publishing notes as the service gets back up to speed.
The Simplenote Team