I just reactivated my old Yahoo email account to prevent this scenario. I was hoping they had retained all my old emails so I could go trough and find any expo

I just reactivated my old Yahoo email account to prevent this scenario. I was hoping they had retained all my old emails so I could go trough and find any exposures. Unfortunately, once an account is deactivated, the emails are gone - even if you log back in with the same password. Deleting the emails from the dormant account is probably the right thing to do, but it makes it impossible to see what sites I may have used the Yahoo email account to register with.