使用Yahoo Small Business中的PHPMailer（）触发邮件只会显示黑页

Question

我正在使用PHPMailer（）类触发邮件。在xampp中工作正常。当我将其托管在Yahoo Small Business中时，它只显示一个空白页面，没有收到邮件。

这是我的PHP文件

<?php

$mail = new PHPMailer();    

$mail->IsSMTP();
$mail->SMTPAuth   = true;
$mail->SMTPSecure = "tls";
$mail->Host       = "smtp.mail.yahoo.com";
$mail->Port       = 587; 
$mail->Username   = 'xxxxxxxx@yahoo.com';
$mail->Password   = 'xxxxxxxx';

$mail->From = "xxxxxxxx@yahoo.com";
$mail->FromName = "Full Name";

$mail->addAddress("xxxxxxxx@yahoo.com");
$mail->addReplyTo("reply@yourdomain.com", "Reply");

$mail->addCC("cc@example.com");
$mail->addBCC("bcc@example.com");

$mail->isHTML(true);
$mail->Subject = "Subject Text";
$mail->Body = "<i>Mail body in HTML</i>";
$mail->AltBody = "This is the plain text version of the email content";

if(!$mail->send()) 
{
    echo "Mailer Error: " . $mail->ErrorInfo;
} 
else 
{
    echo "Message has been sent successfully";
}

我尝试使用mail（）函数，但失败。我遵循了Php mail() vs Yahoo: Can someone Simply Explain Steps required for YAHOO to receive mail from php mail function?并最终遇到此错误。我该如何解决？预先感谢。