I would like all my clients and sites to access the pre-installed webmail package through their own domain.
Let say, I have 2 domain registered under ISPConfig,
Users will be able to access to http://mail.mydomain1.com/
For the simplicity I can use the Co-domain and then forward to https://myipaddress:81/roundcubemail/
But I would like to keep the http://mail.mydomain1.com
instead of the https://myipaddress:81/roundcubemail/
How can I do this?