php mail not working

We have a dedicated ubuntu linux server: [login to view URL] ...and we cannot get php to send email. Our email script is: \n"; $mailBody = "Testing email script content"; mail('[login to view URL]',$mailSubject,$mailBody,$mailHeader); echo "Email Send"; ?> It doesn't send anything. And we need that fixing. ## Deliverables Work out what is issue is with our server not sending, fix it, and send a test email using a test email script. Do not delete any data that is on the server, please. Will provide server control panel, ftp and ssh access if needed. ## Platform NA