subdomain

["Amira Othman" <a.othman@xxxxxxxxxxxxxxx>]

Hi all

 

I am using apache httpd-2.2.3-43.3 on centos 5.6.i have 5 virtual hosts .the server is also mail server and has mx record how can I deny access to url of mx record as it now goes to default virtual host. Any way to block using apache or I should use iptables

thanks