The lesson I learned was this: Don't spy on even your current spouse's email and other electronic data. Because they may well sue you.
Especially if, as here, your spouse (here, the wife) is a lawyer.
The former spouse appears to be represented on appeal by her law partner in a two-attorney firm. In a litigation that -- perhaps not surprisingly -- seems especially nasty.
Regardless, even if your spouse isn't an attorney, let their private stuff stay private. Or else.