What are my options for a new mail chute?

through the said slot , a target detachably held on the front end of the MAIL

This letter drop slot allows easy insertion of all standard-size envelopes, magazines, and small parcels The letter drop opening is approximately 10-58 wide

through wall mail slot sleeve We have a very old mail slot in the outside wall next to the front door It's only 7 wide, so the mail carrier has to fold, bend, or stuff

through the wall mail slot You can lock it to prevent theft An in-wall mailbox slot is similar to a door slot, except the mail goes through the wall instead of through a door