Before age 5, I have no clue what kind of mailbox we had.
5-14: and 19-21 Lived on first floor of various apartments in a city (250k+ people). Our mailbox was always a set of 3, in the entry to the apartment building (always a 3-decker). Each floor had one. Mail carrier would lift flap and drop mail in. We’d lift flap and take mail out. Large packages were left on the floor under the mailboxes. Outgoing envelopes would be left in the box, wedged under the flap. Outgoing packages would left on top of the mailbox or brought to the PO.
14-18: Single family house still in same city. We had the same kind of mailbox and our mail carrier walked the neighborhood with a large bag and went up each driveway to drop off the mail. Large packages were left either at the front door or the carrier would knock on the door and give it to anyone home. Outgoing mail and packages were generally just handed to the mail carrier or left in the box.
21-27: Condo in a small city (50k+ people). We had grouped boxes for every 15 or so condos. They were generally halfway between the units represented by those boxes. I had to walk past 2 driveways (8 units) to get to my mailbox. The big box was broken into smaller boxes, each with its own key for the small front door. The mail carrier opened the huge back door to access every box at once. For large packages, there were 2 extra large boxes at the bottom which had 2 keys. One key was always in the lock. The second key would be left in your box and you used it to open the box. The key would be stuck in the lock after you used it so you couldn’t steal it. Only the mail carrier was able to remove that second key. Outgoing envelopes were put in the extra outgoing box. Packages were either handed to the mail carrier, left on the box if you were really trusting, or brought to the PO. My box was different from the rest of the condo complex because a snow plow hit ours and knocked it back. Since it wasn’t a city plow, they refused to do anything about it. The condo complex insisted it was the Post Offices issue (even though the PO didn’t knock it over). Everyone insisted nothing could be done til the ground thawed. The PO refused to deliver to the individual units (a whole 16 units in 4 buildings, each with door slots) and they said it was against the law to leave it at the management office. So, all the mail for 16 units, for over a week, was left at the post office. Those of us with cars but jobs were screwed because the PO had short hours. Those without cars were screwed because the PO wasn’t in walking distance. That was NOT a happy time in our neighborhood. The condo association finally came to their senses and had a new mailbox installed (in spite of the frozen ground). We got a super nice one, probably because they were afraid we’d sue them.
My boyfriend’s parents lived in a single family home in the same city and their mailbox was a big one they bought at a home improvement store. It used to be at the bottom of their driveway but when they repaved their driveway, they moved it to halfway up. Their box has a yellow flag and a red flag. They put up the red flag when there’s mail to be picked up. When the carrier opens the door, the yellow flag triggers so they can see from the house whether or not the mail has been delivered. The mailbox is large enough for big packages but massive packages generally come UPS or FedEx and they are left on the porch. Outgoing packages are left in the box the same way that outgoing envelopes are.
My mother has the same mailbox but she lives in a single family home in the large city I mentioned above. Her mailbox is right next to her house, on a post. The mail carrier has to walk between her hedges and up the walkway through the front yard. Outgoing packages could be left in the box but my mom never has the correct postage at home and doesn’t like to interact with her carrier so she just brings them to the PO.
27-29: Trailer park in a small city (different state). We had the same kind of mailboxes in the trailer park as we did in the condo complex. Large packages were delivered individually to the trailers but all regular mail was left in the boxes at the entrance to the park. Outgoing envelopes and packages were either dropped in a mailbox, brought to the PO, or mailed from work.
29-30 (now): Single family house in small town (15k people). Our mail carrier drives from house to house (first time I’ve had a mail carrier drive the whole route). All mailboxes are on posts at the front of the yard. Mine is set too far from the driveway to pick up the mail as I drive in so I just walk over to it. I haven’t had any large packages yes but I imagine she’d just walk it up to the house. We need to get a new mailbox (the current one is slanted since it was hit by a plow before we bought the place). We’re going to get a bigger box (the kind our parents have) and we’ll measure the proper height one of these days when we and the maillady are here at the same time. I’ve seen her trying to access our mailbox. It definitely needs to be higher. I leave outgoing mail in the box. If I have a package AND the postage (or money for the postage), I’ll just hand it to her. If I don’t, I’ll go to the PO.
I have also had a PO box at the post office. I have lived in houses with door flaps but I have never had delivery to a door flap.
No matter where I’ve lived, I’ve always been able to flag down a passing mail carrier to give them mail.