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.

Be careful about "unsubscribing" to various services.

They will unsubscribe you, but then they also have all of your information (name, address, anything else) on record and confirmed. They can profit when the sell that data to another mailer "service". It's like a Hydra.

You say all countries, but it's obvious that this is country specific. So here's my tip: move to Canada, the postal service has a duty to respect ~~"no junk mail sings"~~"no junk mail" signs.

I’ve taken the time to annoy the senders. If they come with a prepaid “business reply mail” envelope you can use this in two ways:

• rip up everything except the envelope into small pieces. Put that into the envelope and mail it back to them.
• if you’re dedicated: get a box and fill it with bricks. Tape the envelope on the box and mail it back to them.

They have to pay the postage either way, but one will cost a lot more than the other.

https://www.dmachoice.org/register.php

In the US, you can register here to "reduce promotional mail offers from companies or organizations you don’t have a business relationship with." It costs $4 ($5 if you opt to mail in a form instead of filling out the online form), but it registers you for 10 years.

I did this about 7 years ago and I haven't seen any junk mail since. I added my wife's name under the "add another version of your name" section (you can have 5 alternate names listed) and junk mail to her stopped too.

I use an app called paperkarma. You send them a pic of the junk, they manually unsubscribe you.

They've gone to a subscription model because of course they have, I'd be eager to hear about alternatives if any exist.

In the U.S. Use something like virtual post mail, or any mailbox service like the ups store . They will filter out all bulk mail. This does not apply to PO boxes, they will not filter any mail.

https://www.virtualpostmail.com/

I love virtual post mail. They'll open your mail, scan it, email it to you. You never have to deal with the mailbox again.

And they also remove all the bulk mail. So you don't get any spam.

Nope, but I wish we were getting more junk mail. Every now and then there's a van driving through the city trading junk paper for stuff like paper towels, napkins, toilet paper, baking paper, aluminum foil, packing tape, soap, etc..

I’m in Canada. We’ve never gotten junk mail because our mail delivery person put a green sticker inside the box that says no flyers. We never asked for it, it was always just there. When they upgraded the mail boxes, they put new stickers in too. It’s awesome.