PHPMailer不会向域的电子邮件发送电子邮件，但对外部域工作正常

Question

我正在尝试使用PHPMailer发送两封电子邮件。一个用于客户，一个用于管理。发送到客户端的电子邮件工作正常，但当我尝试向我的域名地址发送电子邮件时，它无效，但PHPMailer显示成功消息。

require_once 'class.phpmailer.php';
require_once 'class.smtp.php';    
$mail = new PHPMailer;
    //$mail->isSMTP();    //When uncomment gives an error
    $mail->Host = 'http://smtp-in-114.livemail.co.uk/';  // Specify main and backup SMTP servers
    $mail->SMTPAuth = true;                               // Enable SMTP authentication
    $mail->Username = 'info@mydomain.com';                 // SMTP username
    $mail->Password = 'mypass';    
    $mail->Port = 466;   

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

    //$mail->isSMTP();                                      // Set mailer to use SMTP
                                       // TCP port to connect to

    $mail->addAddress('info@mydomain.com');     // Add a recipient

    $file_name = 'claimforms/' . $file_name;
    $mail->addAttachment($file_name);        // Optional name
    $mail->isHTML(true);                                  // Set email format to HTML

    $mail->Subject = 'New Online Claim Form';
    $mail->Body    = 'You have a new online MS claim. Please see attached documents</b>';

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