HOW TO EMPTY A LETTERBOX.
Where people often go wrong with emptying a letterbox is that they don't realise that there is an entrance and an exit - neither goes in and out or out and in.
Here's the tricky part. On the other side (not shown in the picture above) there is a little door where you can retrieve things.
When you understand the entrance and exit thing it's really pretty straight forward. Before assembling your letterbox in place, it is a good idea to set it up in your livingroom and have a few practice runs.