Bluffmail is like blackmail, except it's very clear the situation is contrived.
Steve got some bluffmail, claiming someone had hacked the camera on his computer, which was unlikely, because Steve's desktop computer didn't have a camera attached.
Like a wolf for food or a frightened creature from their natural habitat, an imposter in the large herds of buffalo - a person in society that pretends to blend in with the masses for gain or fear.
Don't bluffalo your life away (fear)
I keep getting spam calls from bluffalo's (gain)