I need to send email with html format. I have only linux command line and command \"mail\".
Currently have used:
echo \"To: address@example.com\" >
I found a really easy solution: add to the mail command the modifier -aContent-Type:text/html.
In your case would be:
mail -aContent-Type:text/html -s "Built notification" address@example.com < /var/www/report.csv