I modified the gates of webmin and usermin now to access I esotu being forced to remember my custom doors, I wish I could use sudmonios webmail and admin to access them, or other subdomains and my choice, which do not want is having to enter the ports of the services I have to access because whenever user. webmail.mydominal.com gives page not found because even open the ancient port 20000 !!!
webmail.mydominal.com gives page not found
This probably means you have DNS problems. It could be that you didnt setup correctly your DNS.