Mailgun\Api\HttpApi::httpPostRaw PHP Метод

    protected function httpPostRaw($path, $body, array $requestHeaders = [])
    {
        try {
            $response = $this->httpClient->sendRequest($this->requestBuilder->create('POST', $path, $requestHeaders, $body));
        } catch (HttplugException\NetworkException $e) {
            throw HttpServerException::networkError($e);
        }
        return $response;
    }