Re-directing the 'mail.' sub-directory

This only seems to affect Joomla sites.

For some reason cPanel allows access to the public_html folder through 'mail.' - if you go to any of our sites you can get to the website by entering https://mail.domainname - go figure!

it creates thousands of re-direct issues that are eventually picked up by search console.

Fix is to create a mail. subdomain in cPanel and then redirect that to the main domain - as this example for medifinance