email valadation on external website

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what is wrong with this please does not seem to work properly if i take the last charecter of the email address still echo correct but that wrong please help.

[code]
<?php

$email="admin@google.com";

$remote_url="http://where the email is";

$match_pattern = preg_quote(rtrim($email, "/"), "/");

if ($handle = @fopen($remote_url, "r")) {

while (!feof($handle)) {

$part = fread($handle, 1024);

if (preg_match("/$match_pattern./" , $part)) {

echo "email there";
}
}
fclose($handle);

} else{

echo" no email sorry";

}
?>
[/code]