I read in one of the ramadan advice articles by one of our 'ulama that one's du'a is maqbool (or perhaps it has a better chance of being maqbool?) at the time before fajr (just after suhoor) and just before maghrib/iftar. I sent this information to a "salafi type" friend who asked for the dalil (not surprisingly). I would like to provide it as it may help him accept articles by our scholars in the future (as he is somewhat open...). Does anyone here know the evidence?