On Mon, 06 Aug 2018, you wrote:

I tried adding an e-mail account, and I must have done something dumb
> because the error reported was “This domain isn’t properly set up for
> mail. Please contact support and ask us to fix your mail!”
> It was in very angry red text. Would you kindly correct the error before Skynet tries to hunt me down?
> Thanks 🙂

I have taken care of this issue and Skynet has been silenced.