protected function imapOpen($username, $password)
    {
        $success = false;

        try {
            $imap = imap_open($this->mailbox, $username, $password, OP_HALFOPEN | OP_READONLY, 1);
            if ($imap) {
                $success = true;
            }
        } catch (\ErrorException $e) {
            error_log($e->getMessage());
        }

        $errors = imap_errors();
        if ($errors) {
            foreach ($errors as $error) {
                error_log($error);
            }
        }

        if (isset($imap) && $imap) {
            imap_close($imap);
        }

        return $success;
    }