Jyxo\Mail\Sender::getHeader PHP Method

    private function getHeader(array $except = []) : string
    {
        $header = '';
        foreach ($this->createdHeader as $headerLine) {
            if (!in_array($headerLine['name'], $except)) {
                $header .= $headerLine['name'] . ': ' . $headerLine['value'] . self::LINE_END;
            }
        }
        return $header . self::LINE_END;
    }