Hidden Letterbox

Walking past my neighbour's home I observed this nicely trimmed shrub in front of their home. Upon closer inspection an area of the shrub had been hollowed out to allow for the letter box which hopefully could be found by the local postman.
Yes we still have home mail deliveries even in this modern day world of E mails and I Phones.
The fact that Australia Post has recorded a loss in its sale of postage stamps this year, indicates that letters could be a thing of the past.

What will my neighbour do with his shrub then?