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What is another word for mail slot? what is mail slot Mail slots are a direct mail option that offers a higher level of security that postal or wall-mounted mailboxes can't provide what is the most popular online slot game Deltana online catalog for Mail Slot & Sleeves

what are the best slot machines to win on mail slot: A usually horizontal slot in a door through which mail can be delivered It often has a hinged cover to keep the opening cloised when not in use