<?php

function Domaine_email_OK( $email ) {

  list(
$login, $domaine) = split("@", $email,2);
  return(
checkdnsrr($domaine, "MX"));

}

$demoEmail = htmlspecialchars(trim(stripslashes($demoEmail)));

echo
"<FORM METHOD=POST ACTION=''>";
echo
"<B>Email à tester</B><BR>";
echo
"<INPUT TYPE='text' NAME='demoEmail' VALUE=\"".$demoEmail."\">\n";
echo
"&nbsp;&nbsp;<INPUT TYPE='submit' VALUE='Tester'>";
if (
$demoEmail != "") {
  echo
"<BR><BR>Domaine de l'email <B>";
  echo
Domaine_email_OK($demoEmail) ? "connu" : "inconnu";
  echo
" !</B>";
}
echo
"</FORM>";

?>