How can I redirect traffic from one of my subdomains (e.g. mail.domain.com) to one of Opalstack's webmail interfaces (e.g. https://webmail.de.opalstack.com)
I used to do that when I was at Webfaction. However, here I'm a bit lost.
I created a CNAME DNS record for my subdomain with the "Content" field as "webmail.de.opalstack.com" but nothing is happening.
Can you help me with this?