Originally Posted by till
Did you create a new website with:
in ISPConfig and installed Roundcube in this webite.
Yes, I followed the Mini-HowTo "RoundCube webmail on your ISPConfig within 10 step" guide. I can't reach the RoundCube login page by typing webmail.mydomain.tld. When I type in webmail.mydomain.tld it direct me to the homepage and not the login page.