Basic Email Configuration

I need someone to activate the email system on my dedicated server… I'm the administrator for the server and currently I'm using WHM 10.0.0 cPanel 10.0.0-R7. The php email scripts are working ok but the emails are not being sent. I need someone to fix this problem. It's a very basic work if you know what your doing. After awarding the project I want to communicate with you by msn messenger. You should not take too long to resolve this problem. I think its a miss configuration in the server.