Is it possible to smoke Kratom?

Yep, you take the leaves and smoke them like any other smokeable substance, but if you want to actually get an effect off of smoking it smoke some resin, which you can easily make by boiling down the leaves and straining/drying

taking it orally is much more effective.

I have resin like a black lump about 5 grams left, i smoked two bongs with it in and felt some effects but i will probably try it orally next time.

If you have resin, I recommend just rolling it up into little ovals and swallowing it straight.

Don't expect to get much of a buzz if you have any experience with opiates. Its probably as strong as codeine. Its weak stuff.