Our email services can learn spam/non-spam messages. This feature is currently down for maintenance as we work on the back-end systems. This means that if you move email in to the various 'learn' folders they will stay there and will not be processed at the moment. For the moment, we advise customers not to use this feature. Will will post updates in the next week or so as we may well be changing how this feature works. This should not affect any spam scores etc, but do contact support if needed.
This project is still ongoing. This should not be causing too many problems though, as the spam checking system has many many other ways to determine if a message is spam or not. However, for now, if customers have email that is miss-classified by the spam checking system then please email the headers in to support and we can make some suggestions.
We are working on rebuilding the spam learning system. We expect to make this live in the next couple of weeks.