Easy energy saving solution for old fashioned mail slots

Can I switch from a door mail slot to mailbox? : rUSPS mailbox for door slot The Best Door Mail Slot of 2021 Reviewed Toolsstars• views LockingMailbox• views mailbox door slot Slot Cover and Extra Large Mail Slot Catcher - Mail Slots for Doors Magazine Size MAIL SLOT BASKET CATCHER INCLUDED: Our D30-S door mailbox slot comes

mailbox slot The fully-insulated mailbox system for installation in the door side has flush-mounted, recessed Avantgarde mail slot flaps with finger recess for easy opening