We had the oposite probelm. Meter readers kept putting cards through our door asking for a reading.
When they finally knocked and told me they needed a meter reading today. I kindly explained to him they could read the meter anytime they like. As they meter was where they putthem on the outside. And they did need access to my house for any reason and shut the door.
I have a sign on my door saying if I haven't invited you don't knock. We were just about to eat dinner and a bastard knocked chatting about meters. I told him I was busy and closed the door. He knocked again and set the dogs off who are 2 staffies, I swear my boy staff was headbutting the window to get to what he took as an intruder. Still gormless stands there. Just before I lost the plot he left.
i've disconnected my bell! it was really loud, and i've put foam on my knocker! so there meter readers! :P i did this ages ago, i hate people knocking on my door. i have one of those signs also, so when people come to the door with a clipboard i give them a right telling off! i guiltily kind of enjoy doin it tbh, and the sign is an excellent excuse for a rant!
In defence of posties, the guy who delivers to our street is lovely. He knows I have a baby and raps really softly at the door if the post won't fit through the letter box. And he has the good grace not to look horrified when I answer the door in a dressing gown with hair flying in every direction.
We have nice posties too! Since you mentioned I wonder if this is why they always leave parcels on recycling bins and don't knock - they just scribble a note to tell us on a letter! Not that I've ever moaned at them but I have in the past answered the door with baby in arms and possibly a bit much boob on show! And possibly a slightly wild eyed look..
When our dd1 was born we had a lovely postie. He delivered lots of pink envelopes etc for many days. One day he had a parcel too large to fit through letterbox. He didn't knock, he didn't leave a card. He came back at the very end of his round with a big smile to deliver it. He must have known that banging on the door first thing wasn't a good plan. I was sad when he retired.