docker run -i --rm -e TLS=YES -e mailhub=smtp.gmail.com:587 -e AuthUser=xxx@gmail.com -e AuthPass=xxx philoles/mail sh -c 'df -h > /tmp/mail_report.log && free -m >> /tmp/mail_report.log && mail -s "$HOSTNAME disk and RAM report" xxx@gmail.com < /tmp/mail_report.log'