Stuff

<?php

function validate_email($email)
{

   $regexp = "^([_a-z0-9-]+)(\.[_a-z0-9-]+)*@([a-z0-9-]+)(\.[a-z0-9-]+)*(\.[a-z]{2,4})$";

   $valid = 0;

   if (eregi($regexp, $email))
   {
      list($username,$domaintld) = split("@",$email);
      if (getmxrr($domaintld,$mxrecords))
         $valid = 1;
   } else {
      $valid = 0;
   }

   return $valid;

}

$email .= 

if (validate_email($email)){

	$fp = @fopen("emails.html", "w") or die("Failed."); 
	
	$fp_write = @fwrite($fp, $msg) or die("Failed.");
	
	@fclose($fp); 
	
	$msg2 = '$email <br />';
	
	$fp2 = @fopen("emails.html", "a+") or die("Failed."); 
	
	$fp_write2 = @fwrite($fp2, $msg2) or die("Failed.");

	@fclose($fp2); 
}

?>