I’ve done all of these and now get minimal junk mail in the letter box.

• Contact your municipality and explain the situation and ask for their advice.
• Contact the people delivering the mail and ask them for advice.
• Contact your local gardening centre and ask them if they want paper for composting.
• Put up a no junk mail sign, then contact the companies who are still arriving in your letter box and share your thoughts about their uninvited junk mail. In Australia the last mile delivery of junk mail is often done by one or two companies who don’t want to get a bad name for ignoring your sign.