向多个收件人发送电子邮件看不到其他用户地址

Question

你好朋友我通过管理面板在他们的电子邮件地址上发送注册用户激活链接和代码，它工作正常用户可以获得激活链接和代码。

但问题是users can see other recipients email address In To: 我希望用户看不到其他收件人的电子邮件地址？

这是我的代码

<?php 
//creating activation code
$alpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
$length = 11;
for($i=0; $i<$length; $i++){
$ran = rand(0, strlen($alpha)-1);
$new_key .= substr($alpha, $ran, 1);
}   


$activation = 'activation.php?email='.urlencode($_POST['email1']).'&key='.$new_key;
$your_email = 'test@test.com'; 
$domain = $_SERVER["HTTP_HOST"];
$to = implode(',', $_POST['email1']);
$subject = 'Confirmation';
$message = '<font class="font1">
<a href="http://'.$domain.'/'.$activation.'">http://'.$domain.'/'.$activation.'</a></font>';

$headers .= 'MIME-Version: 1.0' . "\r\n";  
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";  
$headers .= "From: <$your_email>\r\n" .  
"X-Mailer: PHP/" . phpversion(); 

mail($to, $subject, $message, $headers);
?>

选择用户电子邮件地址的表单

<form name ="checkForm" id="checkForm" method="post">  
<?php 
$query=mysql_query("select semail from students order by id") 
or die ('students query');

while($row=mysql_fetch_array($query))
{
?>

<input type="text" name="email1[]" value="<?php echo $row['semail'] ?>"  />

<?php } ?> 

</form>

Answer 1

使用密件抄送

$headers .= 'From: Your Name <test@test.com' . "\r\n";
$headers .= 'BCC: '.  implode(',', $_POST['email1']) . "\r\n";

mail(null, $title, $content, $headers);