after the last update my account APPLE iCloud can no longer sync, connection error occurs
We are aware of this issue and are currently working on a solution.
Make sure that the username you’re using for authentication doesn’t include “@me.com” or “@icloud.com”. I had this exact problem a few days ago, but everything has been perfect since I did this.
See my post in this similar eM support thread for more, but basically Apple seems to have changed something on their end that messed us up: https://discourse.emclient.com/emclient/to…