configure internet/mail server for a company with two domains
 

am new in linux and hve just been told to install Redhat linux for the purposes of internet and mail server.The company has domains

You need to use virtual domains
Read more about linux and administrations , maybe answer to this question is hard work to do...

You need to configure apache ( httpd ) , phpMyAdmin ( if you use for manage databases ) and so.... for particular domains.

But your answer leads to Virtual domains

Regards
ArShAm