[throwawayay02]

In my country the state maintains an alternative to email, where you can receive messages from anything government related, plus any business that registers. It's opt-in only, you cannot receive spam or be subscribed to entities against your will, and of course if you lose access you can just go down to the nearest citizen's office and get it sorted. You can also pay bills through it.

It is a nice solution but unfortunately everyone already has to have email accounts, so it becomes just yet another account to check, which is not attractive.