Resolved webmail.domain.com not working Showing Default Paralle Page

[Ruturaj]

Hello
webmail.domain.com is Not Working It is Showing Default Paralles Page.
we Need To enter Full Url To Access Webmail page
i.e. webmail.domain.com\login.php
Then Only Webmail Page Opens
In DNS Setting A Record For webmail.domain.com Is Present And It Is Pointing To Correct IP Still We Are facing The Problem we are Using horde mail Service For Domain.