Also to follow up on this point above.Hey, so it depends what part of the application your at. But after sponsor approval, the sponsor doesn't really get many emails (I haven't gotten any yet).
You could make sure your gckey is connected in the mean time, if it is, then mails should go to that account as well. You'll also be able to see in the tracker if some kind of mail or message is sent.
But ya, after sponsor approval, i haven't really seen the sponsor get any email.
Secondly, i believe if you have tracker connected, you can edit some contact details from there, that might be worth a try.
If the Sponsor also lists themselves as the representative, (there's a form you must fill in the beginning when submitting your application) then all emails would go to the representative, in this case the sponsor and not the Principal Applicant.
So I receive the emails relating to the Spousal Sponsorship and I simply forward them to my wife or communicate with her regarding process/next steps.