phpmailer показывает всех получателей в почте, он показывает электронные письма всех пользователей в каждом письме в разделе «до» почты
https://i.stack.imgur.com/2zRag.png
$mail = new PHPMailer;
$mail->isSMTP();
$mail->SMTPDebug = 2;
$mail->Host = 'smtp.hostinger.com';
$mail->Port = 587;
$mail->SMTPAuth = true;
$mail->Username = 'filip@joint2purchase.com';
$mail->Password = 'filip321';
$mail->setFrom('filip@joint2purchase.com', 'Client Filip');
//get the administrators emails
$stmt = $db->prepare('SELECT USERNAME,EMAIL,TYPE FROM MEMBERS WHERE TYPE = :T LIMIT 100');
$stmt->execute(array(':T' => 'ADMINISTRATOR'));
//for each email add a recipient
while($row3 = $stmt->fetch()){
$toname = $row3['USERNAME'];
$tomail = $row3['EMAIL'];
$mail->addAddress($tomail, $toname);
}
//build the rest email (html, attaches, etc)
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'Here is the subject';
$mail->Body = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
$mail->addAttachment('test.txt');
if (!$mail->send()) {
echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
echo 'The email message was sent.';
}```