webmail ip instead of domain

[EXdeliver]

Hello,

I have a extra server, i've installed directadmin.
However when i try to reach the webmail, it show the ip adress instead of the actual domain name.

For example

http://domain.nl/webmail
becomes
http://*.*.*.*/webmail/

How can i fix this issue?

Im looking forward to your reply.

 

[nobaloney]

When I try it I get a 404 Not Found error.

For more information, please look here.

Jeff