Make sure that the oxtails are nice and clean.
Place the oxtails on a flat surface, then drizzle them with the olive oil.
Combine all the seasonings, then generously sprinkle all over the oxtails.
Put the oxtails into a large freezer bag, and refrigerate overnight.
Preheat your smoker to 300 F.
Once the temperature has reached 300 F, put in the oxtails.
Smoke the oxtails from 3-5 hours (depending on size!)
Remove the oxtails from the smoker, and cover with foil.
Let sit for 30 minutes (if eating now), or refrigerate OR freeze for later use!