Several years ago, I switched from sbcglobal.net to gmail. At the time, I set gmail to continue forwarding emails from sbcglobal to gmail for 30 days (I don't remember how I did that, unfortunately). I am *still* receiving forwarded emails, several years later.
How do I stop this?
You would need to log into the sbcglobal.net account and change the settings. If you don't have access to that account anymore, you could filter it to a label. At least it wouldn't go to your inbox.