这个问题可能是Bluehost的SMTP服务器没有正确配置所导致的。你可以将脚本中的SMTP服务器更改为以下内容，以确保重试发送您的电子邮件：

// Replace this with your own email
$to = "youremail@email.com";

// Replace this with the subject of the email
$subject = "Subject of the email";

// Replace this with the body of the email
$body = "Body of the email";

// Replace this with your own email address
$from = "youremail@email.com";

require_once("phpmailer/class.phpmailer.php");

$mail = new PHPMailer();

$mail->IsSMTP();
$mail->SMTPDebug = 1; // Debugging purposes only
$mail->SMTPAuth = true;
$mail->SMTPSecure = "ssl";
$mail->Host = "smtp.gmail.com"; // Replace this with your SMTP server
$mail->Port = 465; // Typically 587, but may vary
$mail->Username = "yourusername";
$mail->Password = "yourpassword";
$mail->SetFrom($from);
$mail->Subject = $subject;
$mail->Body = $body;
$mail->AddAddress($to);

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

确保替换以下内容以符合您的WordPress站点上的设置：

将 $to 和 $from 更改为您要发送电子邮件的电子邮件地址。

将 $subject 更改为电子邮件的主题。

将 $body 更改为电子邮件的内容。

将 Host 更改为您的SMTP服务器。