设置PHPmailer，没有收到任何电子邮件？

Question

我今天一直试图设置我的php电子邮件，但出于某种原因它根本就不发送我的电子邮件。我有我的网站托管hostgator并被告知通过gator3115.hostgator.com设置smtp与端口465使用hostgator这是我已经完成但但当我检查收件人电子邮件仍然没有＆t; t什么都在那里。任何人都知道这里发生了什么？

<?php
    ob_clean();session_start();

    if (isset($_GET['logout'])){
    session_destroy();  
    }

    if (!isset($_SESSION['loggedin']) || $_SESSION['loggedin'] == false) {
        header("Location: index.php");
    }

    if (isset($_POST['submit'])){   

        require 'PHP/mailer/PHPMailerAutoload.php';

        $mail = new PHPMailer;

        //$mail->SMTPDebug = 3;                               // Enable verbose debug output

        $mail->isSMTP();                                      // Set mailer to use SMTP
        $mail->Host = 'gator3115.hostgator.com';  // Specify main and backup SMTP servers
        $mail->SMTPAuth = true;                               // Enable SMTP authentication
        $mail->Username = '*******';                 // SMTP username
        $mail->Password = '*******';                           // SMTP password
        $mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
        $mail->Port = 465;                                    // TCP port to connect to

        $mail->setFrom('matt@sulmaxmarketing.com', 'Mailer');
        $mail->addAddress('sulmaxcp@gmail.net', 'Joe User');     // Add a recipient
        $mail->addAddress('ellen@example.com');               // Name is optional
        $mail->addReplyTo('info@example.com', 'Information');
        $mail->addCC('cc@example.com');
        $mail->addBCC('bcc@example.com');

        $mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
        $mail->addAttachment('/tmp/image.jpg', 'new.jpg');    // Optional name
        $mail->isHTML(true);                                  // Set email format to HTML

        $mail->Subject = 'Here is the subject';
        $mail->Body    = 'This is the HTML message body <b>in bold!</b>';
        $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

        if(!$mail->send()) {
            echo 'Message could not be sent.';
            echo 'Mailer Error: ' . $mail->ErrorInfo;
        } else {
            echo 'Message has been sent';
        }
    }

?>