Title.
This applies to all countries, but please state where you are from to avoid confusion.
With the amount of junk mail people get weekly, I was curious if there are ways you can block, remove or filter the actual mail from ever getting to your mailbox.
Germany, “no junk mail and no free newspapers”-stickers stops everything. Punishments for the companies are harsh once a pattern of ignoring those it’s established by the regulatory agency, so everyone down the line all the way to the people distributing them gets pressured to follow the rules.
Edit: this is for generic junk. For letters addressed to you that seem like junk, you’ll have to tell the company you don’t want any more. Which again, they’ll have to obey.