Ben textarea ile alt alta toplu mailler sistemi yapmaya çalışıyorum fakat bir hata aldım çözemedim. Yardımcı olursanız sevinirim.

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
if(isset($_POST['submit'])) {
// Gelen veriyi satır satır array'a alalım.
$mailler = explode("\n", str_replace("\r", "", $_POST['pesan']));
foreach ($mailler as $mail) {
Mailgonder($mail);
}
require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';
$mail = new PHPMailer(true);
try {
//Server settings-
$mail->SMTPDebug = 0; //Enable verbose debug output
$mail->isSMTP(); //Send using SMTP
$mail->Host = 'mail.privateemail.com'; //Set the SMTP server to send through
$mail->SMTPAuth = true; //Enable SMTP authentication
$mail->Username = ""; //SMTP username
$mail->Password = ""; //SMTP password
$mail->SMTPSecure = 'tls'; //Enable implicit TLS encryption
$mail->Port = 587; //TCP port to connect to; use 587 if you have set `SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS`
//pengirim
$mail->setFrom('"deneme@deneme.com', 'test');
$mail->addAddress($mailler); //Add a recipient
//Content
$mail->isHTML(true); //Set email format to HTML
$mail->Subject = $_POST['judul'];
$mail->Body = "test";
$mail->AltBody = '';
//$mail->AddEmbeddedImage('gambar/logo.png', 'logo');
//$mail->addAttachment('');
@$mail->send();
return 'Message has been sent';
} catch (Exception $e) {
return "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
}
?>