Php SMTP错误：无法连接到SMTP主机。失败

我在通过php mailer发送邮件时遇到问题，我可以轻松地在localhost（Wampp）上发送电子邮件，但在live Server上我收到错误：

SMTP错误：无法连接到SMTP主机。失败

---

尝试设置
$mail->SMTPSecure='tls'而不是
'ssl'
。顺便说一句，你说你“创建”了一个php.ini？应该已经有一个PHP在服务器上使用。您的服务器是Windows服务器还是Linux服务器
.dll
-文件仅限Windows。即使在tls之后也无法工作！！我不知道是windows还是linux！你不知道服务器是运行Windows还是Linux？您是如何以及在何处创建/编辑
php.ini
-文件的？你如何连接到服务器？我有cpanel的登录id和密码，它是别人的共享托管帐户。如果你不想费心把你的代码建立在PHPMailer提供的测试代码上，也不想费心阅读文档、阅读错误消息或运行一个不到几年的版本，许多其他网站也在那里，我没有同情心。
 <?php 
    if (isset($_POST['submit'])) {
      # code...
    $customeremail="*************";

    $message=
    'Full Name: '.$_POST['name'].'<br />
    Subject:    '.$_POST['subject'].'<br />

    Phone:  '.$_POST['phone'].'<br />
    Email:  '.$_POST['email'].'<br />
    Comments:   '.$_POST['message'].'
    ';
    require "phpmailer/class.phpmailer.php"; //include phpmailer class

    // Instantiate Class
    $mail = new PHPMailer();

    // Set up SMTP
    $mail->IsSMTP();                // Sets up a SMTP connection
    $mail->SMTPAuth = true;         // Connection with the SMTP does require authorization
    $mail->SMTPSecure = "ssl";      // Connect using a TLS connection
    $mail->Host = "smtp.gmail.com";  //Gmail SMTP server address
    $mail->Port = 465;  //Gmail SMTP port
    $mail->Encoding = '7bit';

    // Authentication
    $mail->Username   = "******"; // Your full Gmail address
    $mail->Password   = "******"; // Your Gmail password

    // Compose
    $mail->From = "*************";
    $mail->FromName = "**********";

    $mail->Subject = "DRIVER AND CAR DETAILS";      // Subject (which isn't required)
    $mail->MsgHTML($message);

    // Send To
    $mail->AddAddress($customeremail, "Recipient Name"); // Where to send it - Recipient
    $result = $mail->Send();        // Send!



    if(!$mail->Send()) {
    echo 'Message was not sent.';
    echo 'Mailer error: ' . $mail->ErrorInfo;
    } else {
    echo 'Message has been sent.';
    }
    ?>