Magnetic Mailbox Cover. If beauty, quality and durability are what you're looking for in a line of mailbox covers, go with the original. MailWraps Magnetic Mailbox Covers. They were the first to hit the market in 1988 and they continue to lead the way in print quality, construction and design selection. Screen printed for vivid, long-lasting color. A one-year weather-proof guarantee. Made in the USA.