The hacked emails were verified by the campaign but they noted a sprinkling of fake ones to mislead the public.
The good news is that there is a news blackout 44 hours before the polls so the released emails only had a few hours of life before the blackout.
So we have a very specific event that we can compare to the results. We have the last poll which showed Le Pen getting crushed and polls that she lost the debate Bigly. Now if there is a difference to be seen,we know the cause.