What is the mailbox for?

Although it is the era of the Internet, the mailbox has really played a great role. Considering the importance and safety responsibility of some letters, many residential properties are reluctant to collect letters and other items for residents, so the letter box is very important at this time, but it is also easy to be damaged, so we will choose some good quality letter boxes. By the way, it is really good to recommend the letter box of Blu-ray technology to the landlord, which saves us a lot of trouble.