PHP sendmail not sending

[arifkhan]

I have a form that submits to PHP self. This script runs and says it is successful, but I do not receive an email. \[code\]if(isset($_POST['name']) and isset($_POST['email']) and isset($_POST['phone'])) { //setup variables from input $EMAIL = "[email protected]"; $inEmail = $_POST['email']; $subject = "Enquiry from ".$POST['name']; $name = $_POST['name']; //setup message $message = "Enquiry from: ".$name."\nEmail: ".$inEmail."\nPhone: ".$phone."\n\nDeparture Date: ".$departureDate."\n\nreturnDate: ".$returnDate; $message = wordwrap($message, 70); //email enquiry details to site owner if (mail($EMAIL, $subject, $message)) { echo "Enquiry sent!"; } else { echo "fail!"; }?>\[/code\]The "Enquiry sent" message does appear.I have postfix installed and I have also tried with sendmail installed. I have scanned local host using nmap and the smtp port is open.Can anyone see any reason that the mail does not sent.