How can I get into my old sbcglobal.net email account? I don't remember password

I desperately need to get into my old sbcglobal.net account but do not remember my password. I believe this old account was linked with my ATT account that I've had for years, but for awhile I did not have dsl on this account.  Then, when I put DSL back onto it, they gave me a new email account. I really need some emails from this account for a potential court case.  HELP!