If you don't want "junk mail". Put a note in your mail box stating you don't want to receive any UNADDRESSED MAIL (no name or address). After, you might see a little red sticker ( red dot) in your mail box, it's a reminder for the letter carrier that you don't want "junk mail.
There is a process for the letter carrier to "red dot" your mail box but I won't bore you.
Keep in mind you won't receive any McDonalds, Canadian Tire, Crunch Fitness flyers flyers or/maybe and community information afterwards. You can't pick and choose what UNADDRESSED MAIL you want. It's been awhile since I was a letter carrier so things might have changed. You can call you local Canada Post Depot for more information. One more thing, please don't forget to clear your steps and driveways of ice and keep your dog safe and secure. Thank you!