email verify - checkdnsrr

[raqit]

I have the following code which does not work... the checkdnsrr if statement always evaluates to FALSE. When I feed the checkdnsrr function a single email address, it works fine..

<?php
//emailverify.php
Include "common.inc";

html_header();

$emailfile = "./emailmerged.txt";
$fp = fopen ($emailfile, "r");

while (feof($fp) == FALSE) {
	$email = fgets($fp, 200);
	list ($username,$domain) = split ("@",$email);


	if (checkdnsrr($domain) == TRUE) {  
		echo "MX record for $domain exists"; echo "<br>"; echo "<br>";
	} else {
		echo "MX record for $domain <b>does not</b> exist"; echo "<br>"; echo "<br>";
	}
}

html_footer();
?>

Any suggestions?
Thanks,
--jb