This was the best answer for me. The commands worked, except for one thing: I'm one of the people that turned on a GMail feature to create unique passwords for apps that want to send mail for me. So I had to go to Google's site, create a new app password, and use THAT in the echo command instead. Now things are working!
Info on how to create a Google app password:
https://support.google.com/accounts/answer/185833
Mike