I wouldn't trust a person like Donna Brazile with running a thing as simple as a banana stand, the fact that she claims the emails were falsified convinces people like myself that they were indeed the real deal.
And if someone wasn't aware emails are DKIM verified for authenticity.
Actually, Donna Brazile, who is inexplicably still the current chair of the DNC, claimed the emails were falsified: https://youtu.be/P_WHsr07cbY?t=458