PHPMailer sending multiple mails individually

[davidbcn]

how to send mails individually instead of sending to all recipients together?
my code is:

function SendMail($msg,$subject,$addresses)
    {
    require "class.phpmailer.php";
    //Fetch from email here
    foreach($addresses as $key=>$val){
             $email = test_input($val);
            if((trim($email)=='') || (!filter_var($email, FILTER_VALIDATE_EMAIL))){
                unset($addresses[$key]);
            }
        }
        $addresses=array_unique($addresses);
    $row = FetchAllsettingsCustomMailchmp();
    //end fetch
    $mail = new PHPMailer();
    $mail->PluginDir = "";
    $mail->Host = "localhost";
    $mail->From = $row['email_from'];
    $mail->FromName = $row['sitename'];
    $mail->Subject =  $subject;
    foreach ($addresses as $address)
        $mail->AddAddress($address);
    $mail->MsgHTML($msg);
    $mail->IsHTML(true);
    $mail->AltBody ="Order";
    $mail->CharSet = 'UTF-8';
    $success = $mail->Send();
    $try = 1;

    while((!$success)&&($try<1)&&($mail->ErrorInfo!="SMTP Error: Data not accepted"))
        {
        sleep(5);
        $success = $mail->Send();
        $try++;
        }

    $mail->ClearAddresses();
    if(!$success)
        return false;
        else
        return true;
    }

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}