Docker Solution for the error below:
This error occured when running docker run hello-world run docker login and enter your docker account username, not your email.
What is postfix? Postfix is a native mail transfer agent for sending emails, it is natively installed in OS X, all I’m going to show is how to configure it. Open your terminal and log in as a root user. Next, enter this line, “vi /etc/postfix/main.cf” without the quotes, add this line
save the file, google “how to use vi” if you aren’t familiar with it. We need to