Hello!

Currently I have a form where the user can submit emails in a comma separated format to the $row in database $contacts. How can I set this up correctly so the user can email their contacts? As of right now the script emails everybody but just not in the correct email format. Thank You!
PHP Code:
<?php

$formMessage 
"";
$senderName "";
$senderEmail "";
$senderMessage "";
if (isset(
$_POST['cusername']))
{

 
    
// Gather the posted form variables into local PHP variables
    
$senderName $_POST['cusername'];
    
$senderEmail $_POST['cemail'];
    
$senderMessage $_POST['msg'];
    
// Make sure certain vars are present or else we do not send email yet
    
if (!$senderName || !$senderEmail ) {
 
         
$formMessage "The form is incomplete, please fill in all fields.";
 
    } else { 
// Here is the section in which the email actually gets sent

        // Run any filtering here
        
$senderName strip_tags($senderName);
        
$senderName stripslashes($senderName);
        
$senderEmail strip_tags($senderEmail);
        
$senderEmail stripslashes($senderEmail);
        
$senderMessage strip_tags($senderMessage);
        
$senderMessage stripslashes($senderMessage);
        
// End Filtering
 
$to "$contacts";         

   
$from "";
        
$subject "Prospect For Property";
        
// Begin Email Message Body
  
$message '<html><body>';
';

$message .= "</body></html>";
        // Set headers configurations
         $headers = "MIME-Version: 1.0\r\n";

      
       

$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";
        // Mail it now using PHP'
s mail function
        
mail($to$subject$message$headers);
        
$formMessage "Thanks, your message has been sent.";
        
$senderName "";
        
$senderEmail "";
        
$senderMessage "";
    } 
// close the else condition

// close if (POST condition
?>