You can't control it effectively. It doesn't work with princ or prompt, and it doesn't respect nomutt to suppress unwanted prompts. This is one of the worst weaknesses of the thing, besides getting in the way of user input.
Once I realized it wasn't possible to control what it displayed, and that after a week all of my users had turned it off in disgust anyway, I just stopped thinking about it.
Maybe one day they'll fix the thing so that it's at least minimally functional for a programmer. Until then, IMO it's a waste of time to even worrry about it.