PhpMailer，ClearAddresses(）赢得'；不起作用，信息被发送给每个人

我正在尝试向不同的用户发送不同的消息。我制作了一个电子邮件地址数组，在遍历它的同时，我想将message2发送给user2。

在重用同一邮件实例时，在每次迭代开始时，我都声明$mail -> ClearAddresses()，但现在user2得到了user1和user2…的消息。

在迭代开始时，地址不会被清除，我缺少什么？

谢谢！

// settings
        
$mail = new PHPMailer;
        
$mail->isSMTP();            // Set mailer to use SMTP
$mail->Host = 'xxx';        // Specify main and backup SMTP servers
$mail->SMTPAuth = true;     // Enable SMTP authentication
$mail->Username = 'xxx';    // SMTP username
$mail->Password = 'xxx';    // SMTP password
$mail->SMTPSecure = 'ssl';  // Enable TLS encryption, `ssl` also accepted
$mail->Port = 465;  
$mail->CharSet = "UTF-8";   // TCP port to connect to
function sendInvoice($mail, $addresses) {
    foreach($addresses as $recipient) {
        $mail->ClearAddresses();
        $mail->setFrom('mail@domain.eu', 'My Server');
        $mail->addAddress($recipient['email'], $recipient['name']);  // Add a recipient
        $mail->addReplyTo('mail@domain.eu', 'My Server');
        $mail->isHTML(true);
        $mail->Subject = $recipient[subject];
        //$mail->Body    = $message;
        $mail->MsgHTML($recipient[message]);        
            
        if (! $mail->send()) {
            echo 'Message could not be sent.';
            echo 'Mailer Error: ' . $mail->ErrorInfo;
        } else {                    
            //echo 'Message has been sent';
        }
    }
}