Should be fixed for the minutice and costajca domains but may take 2 hours to take effect. For mail, the officially supported solution is to use morty.heliohost.org as the IMAP and SMTP host names.
There is no webmail or mail subdomain under the elearning domain (fourth level domains don't have these), so you won't be able to get a certificate for those.
Wildcard certificates are not supported on our service.