EvaK:Olga1780:Because of all the packages he has to dump at the back door!
He doesn't even bother to ring the bell anymore.
I moved out to the countryside a couple of months ago, and realized something really funny:
The mailman here never knocks on the door and wait for someone to open (the doorbell isn't working, if we have one. Not sure if we do).
He just walks right in and leave the packages on the dresser in the hallway
If I hear him/her I don't even manage to get out there before he's gone. IF I hear it, often those packages just seem to have appeared in the hallway by magic.