My iCloud and Mail accounts are fine and functioning normally, but my partner -- as of about 12 or so hours ago -- cannot send or receive mail from his account on our iMac, MacBook Air, or his iPhone. Accessing iCloud from Safari doesnI't work either -- he can login, and the other functions work, but Mail refuses access.
When using devices, he gets repeated requests to enter his password, but when he does so, the password doesn't work. He tried changing his password, and that had no effect either. What's going on?
I can't figure out how to get help from Apple, either. Any advice or suggestions are very much appreciated. I believe his software is all up to date.