/**
* Checks the given email address
*/
function validate($value)
{
if (empty($value)) {
$this->_setError(false);
return true;
}
list($userName, $domain) = explode("@", $value);
$connectAddress = $domain;
if (!Dns::checkdnsrr($domain, "A")) {
$this->_setError(ERROR_RULE_EMAIL_DNS_SERVER_UNREACHABLE);
return false;
}
if (Dns::checkdnsrr($domain, "MX") && Dns::getmxrr($domain, $mxHosts)) {
$connectAddress = $mxHosts[0];
}
if ($connect = fsockopen($connectAddress, 25)) {
$out = fgets($connect, 1024);
if (ereg("^220", $out)) {
$server =& HttpVars::getServer();
fputs($connect, "HELO " . $server["HTTP_HOST"] . "\r\n");
$out = fgets($connect, 1024);
fputs($connect, "MAIL FROM: <" . $value . ">\r\n");
$from = fgets($connect, 1024);
fputs($connect, "RCPT TO: <" . $value . ">\r\n");
$to = fgets($connect, 1024);
fputs($connect, "QUIT\r\n");
fclose($connect);
if (!ereg("^250", $from) || !ereg("^250", $to)) {
$this->_setError(ERROR_RULE_EMAIL_DNS_NOT_PERMITTED);
return false;
}
}
} else {
$this->_setError(ERROR_RULE_EMAIL_DNS_SERVER_UNREACHABLE);
return false;
}
return true;
}
