In this post you describe the purpose of the email token:
What it states is that as long as the email is FROM the same address as is on my account, it will be added to my shipment. I would like my wife to be able to email to that token as well since we both use the same shipment tracking. Can you allow emailing to the token from more than one email address?
IE: my email is email@example.com. I want to also be able to email package info from firstname.lastname@example.org and have it in the same tracking account.