Sending mail from Ubuntu 16.04
This worked for me:
https://askubuntu.com/questions/522431/how-to-send-an-email-using-command-line
With CERT fixes from here:
https://stackoverflow.com/questions/39341137/postfix-must-issue-a-starttls-command-first
Golden nuggets where no entry is longer than my expected attention span
This worked for me:
https://askubuntu.com/questions/522431/how-to-send-an-email-using-command-line
With CERT fixes from here:
https://stackoverflow.com/questions/39341137/postfix-must-issue-a-starttls-command-first