This is going to be the last episode in my series of rants about Royal Mail. It's about the company's inability to respond to questions and suggestions this time.

Royal Mail's chief executive, Moya Greene, explains why Royal Mail won't respect 'No Junk Mail' signs.

I've designed a 'No Unaddressed Mail' sticker for the Royal Mail. It's based on the company's 'Neighbours Not Trusted' sticker.

There's a new product in the Sticker Shop: 'No Cold Callers' stickers.

There's a new sticker in the shop! It should stop any type of unsolicited, unaddressed mail, including charity bags.

Royal Mail will soon start leaving parcels that can't be delivered to your neighbours. People who don't get on with their neighbours can opt out by putting a sticker on their door. Perhaps we could also have a No Royal Junk Mail sticker?

I've redesigned the 'No/No' and 'No/Yes' letterbox stickers, and I want you to buy them!

Free newspapers are completely unregulated. Good luck trying to stop a circular such as the East Kilbride Mail.

For a long time I refused to sell stickers with the text 'No Junk Mail'. I've now decided to give them a try.

A councillor in Palmerston, New Zealand, would like to fine junk mailers who ignore 'No Junk Mail' signs. It seems like a sensible idea to me.