I'm going through a nasty divorce, and I have reason to believe my wife has accessed my email account, which is through google. Does anyone know whether they keep ip addresses of users who access accounts, and if so, is there any way to get that info short of a subpoena?

I don't think its possible. But i would definitely go and change every password you have to something she couldn't guess.

i think its illegal to open someone else's emails just like it is for regular mail, so if she uses anything against you with the divorce you could inquire about taking legal action.