Thank you very much for Quick Reply.

so you should change the hostname of the web server to something like www.ClientCompanyName.co.ke
Is that meant to put the host file entry like?

<ClientIP> www.ClientCompanyName.co.ke
<ClientIP> push.Servername.www.ClientCompanyName.co.ke

Or change the machine name as "www.ClientCompanyName.co.ke"