You can connect up to 4 email accounts to your SaneBox account. You can log into your SaneBox account with any one of the four addresses you’ve added.
Once you are logged into your SaneBox account you can switch to view the settings of another address by simply clicking on the desired email address from your selection on the Menu at the top left corner of your SaneBox Dashboard.
For details on switching/updating email providers, please view the following Help Page