Question: unable to add yahoo/google mail accounts
since upgrading to El Capitan I'm unable to add any yahoo or google account ...
when trying to add an account (gmail or yahoo) into mail an error message pops up stating:
Failed to verify the server certificate. This could be because of your network configuration or your proxy settings.
when trying to access the accounts via web browser all goes ok, so there’s no network/internet connection or proxy issues. In fact, I'm using no proxy whatsoever.
The error is the same if trying to add the accounts using mail or the internet accounts system preference ... I imagine is something related to OAuth since for any of these two providers that is the authentication method used to configure them
any help would be greatly appreciated
MacBook (13-inch Aluminum Late 2008), OS X El Capitan (10.11)