The tapes were secretly recorded by Oksana in the midst of their nuclear breakup and custody battle.
We've also confirmed Mel is heard on tape calling Oksana a "whore" and a "c**t."
The tapes have been submitted to the judge in their custody battle and are under seal. Sources say the tapes were recorded prior to May, when Mel and Oksana reached a custody agreement with a mediator.
And TMZ has learned ... Mel sent Oksana a number of incendiary emails that she kept.
TMZ broke the story in 2006 when Mel went nuts on a cop after being busted for DUI, saying, "F**king Jews ... The Jews are responsible for all the wars in the world."
UPDATE: Mel's rep just told TMZ he could not confirm the credibility or accuracy of the tapes. TMZ, however, has confirmed that the tapes are the real deal.
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