WOW. Our mailbox is a 4-plex made out of brick. It is about 6 feet tall by 4 feet long by 2 feet deep. Due to people got tired of their mailboxes being destroyed, repeatedly. So most of the residents on our street contracted for these huge brick contraptions that cannot be knocked over by an old pickup truck or a teen with a baseball bat.
My mailbox is on a 12 x 12 oak post. I got tired of the snowplow busting them all the time.
This one has lasted since 2008 with only the mailbox getting bent up some.
Up heyah in Maine, fixin’ up your letterbox is an annual event after a winter of snowplowing. It’s wikkid hahhd on the gear!