We are using postalmethods in our product. We want to download envelope file associated with a letter.
Can you please tell us the method name to do so?.
Also, it would be great if you give some example.
If you mean downloading templates for creating letters, they can be found here: http://www.postalmethods.com/resources/developers-guide/templates.
If you mean downloading the envelope simulation - the image that simulates what your letter would look like inside the envelope - then it can be downloaded from our Control Panel web site at https://cp.postalmethods.com.
Since you requested code sample, you might want to use our API to download the envelope simulation, I am sorry to say that such a method is unavailable.
If you need any further assistance, please post back.