On 16/01/2019 23:49, alan_m wrote:
On 16/01/2019 20:50, Steve Walker wrote:

The only problem I can see is that it would make replacement of
full-glass porch door, like for like, impossible or require a
ridiculous looking hole in the middle of the glass.


Vertical positioned letterbox on the edge of the door nominally on the
centre line of the height.

The sides of such doors are not usually wide enough and would be severly
weakened by a large hole. Widening the sides would make the glass
narrower and look very odd.

SteveW