The meaning of mailbox tattoo is the sustenance of hope. Mailbox can be said to be a kind of commemoration or a kind of sustenance. It has been with us for such a long time. Although it has been replaced by advanced technology, the existence of writing letters makes people slow down.

A post office box is a private inbox placed in a post office. In the rural areas of the United States, Canada and Australia, it is not cost-effective to send mail to the government due to sparsely populated areas. Local post offices will lend post boxes to residents at lower prices or even free of charge.

Source: @ajmcguiretattoos