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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.
The only way is to individually call senders and ask them to stop.
The US Mail system will not take action against junk mail because junk mailers pay for the majority of the upkeep of the mail system.
Think of junk mail like blood plasma. In order to get those red blood cells to you, you need them to be embedded in plasma so they can move through the system.
Thanks for the information; prior to the amount of junk mail today, was this or something similar the case for the pony express or OG mail service?