My domain is hosted on a virtual server and managed via Plesk. The domain is registered with GoDaddy and I use GoDaddy’s DNS servers.
In Plesk, I selected the domain, chose the Let’s Encrypt icon and went through the motions for creating a wildcard certificate (having previously followed the instructions for allowing acme-v02 protocol) and setting up the appropriate DNS TXT entry in GoDaddy. That all worked and https on my main domain is working including www.
I was expecting, that by using a wildcard certificate, that all sub-domains would be accessible via https but webmail.mydomain isn’t working.
Any ideas why not?