phpmailer not working

<?php 

    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        $name = trim($_POST["name"]);
        $email = trim($_POST["email"]);
        $message = trim($_POST["message"]);

        if ($name == "" OR $email == "" OR $message == "") {
            echo "The form is not complete";
            exit;
        }

        foreach($_POST as $value) {
            if(stripos($value, 'Content-Tyoe:') !== FALSE) {
                echo "There was a problem with the information you entered";
                exit;
            }
        }

        require_once("inc/phpmailer/class.phpmailer.php");
        $mail = new PHPMailer();

        if (!$mail->ValidateAddress($email)) {
            echo "You must enter a valid email";
            exit;
        }

        $email_body = "";
        $email_body = $email_body . "Name: " . $name . "\n";
        $email_body = $email_body . "Email: " . $email . "\n";
        $email_body = $email_body . "Message: " . $message . "\n";

        //TODO: Send Email

        header("Location: contact.php?status=thanks");
        exit;
    }

    $pageTitle = "Mike's Contact Info"; 
    $section = "contact";
?>