Domains with ssl certificate enabled on plesk redirects the webmail incorrectly.
When we first access http://webmail.brunozp.com it works. Then if we access https://brunozp.com and then try http://webmail.brunozp.com it redirects to https://webmail.brunozp.com
As plesk doesn't support let's encrypt auto renew on webmail, and the user doesn't want to update it mannually he asked to keep webmail unsecured.
How can it be solved?