Mel Gibson: 'I'm a failure'

New emails surface between him and Oksana

As authorities question the authenticity of photos of Oksana Grigorieva without her two front teeth after a supposed blowout fight with ex Mel Gibson, new emails have surfaced showing affection between the two.

Writes Grigorieva in an email nearly two months after their January 6 fight (obtained by, "U r an anusually [sic] extraordinary person.  Ur versitile talent speaks louder than the words!  U r capable to make a masterpiece about jesus and to build the church for him!  U r just one person, but u did this!  In itself it's a lifetime wearthy atchivements, but for only chosen one."

The email was in response to one Gibson had sent her earlier that read, "I really am losing my grip.  I desperately need a solution.  Sorry it has to affect you.  I can't stand anything any more ... I'm stuck… I try to be ok but it overpowers me & i'm (sic) something I don't want to be.  It's a primal scream thing.  The pain is too great & everywhere I turn is making it heavier.  Oh to have peace!  Oh to have joy.  Oh to be able to provide it for another.  I'm a f**king failure."

Grigorieva -- who is currently engaged in a nasty custody battle with their 8-month-old daughter, Luciana -- also wrote to Gibson, "Please don't torcher urself like that, please!!!! U dint do anything to be so hard on urself. U r amazing man and always will be in my eyes and I will make sure Lucy knows it."

A law-enforcement source told The Hollywood Reporter earlier this month that officials were investigating the brutal photo.

"The photograph just shows her with two veneers missing," the source said. "There's no evidence of any bruising around her mouth, indicating that she'd been hit."