Explaining more why the request in other thread is not solved.
Using all my mouse drawing skill abilty here 
when a particles hit an object you expect the object to hits on particles surface. if you check the emitter collision box it will looks like the collision is skipped (idd it is skipped).
tha’z why my request is different…a perfect collision with particles is not possible bcs as someone already pointed out is too heavy in performance.
I guess is better to have a premade box scalable in size that surround the area of the particles instead to check the emitter box.
In truth the emitter should stay untouched…cos wel…it emits particles…
mosts of the times you don’t need a perfect collision, …but something believable
…when you wan it to happen…it should happen …and not skipped.