function sendEmail($from, $to, $sub, $body){
    require_once "Mail.php"; //ez a sima pear-es mailer https://pear.php.net/package/Mail

    $host = "smtpszerver";
    $port = "587";
    $username = "username";
    $password = "pass";
    $headers = array (
            'From' => $from,
            'To' => $to,
            'Subject' => $sub,
            'Content-Type' => "text/plain; charset=UTF-8\r\n"
    );

    $smtp = Mail::factory('smtp',
            array (
                'host' => $host,
                'port' => $port,
                'auth' => true,
                'username' => $username,
                'password' => $password,
                'SMTPSecure' => "tls"
            )
    );
    $mail = $smtp->send($to, $headers, $body);

    if(PEAR::isError($mail)) {
        return $mail->getMessage();
    }else{
        return "Message successfully sent!";
    }
}