The mailbox money is where you get money in your mailbox with little or no work involved.
Mailbox money can mean checks sent to your mailbox with little to no work involved or it can also be a term used to mean money made online and sent to your bank account basically on autopilot.
Passive Income is the new term used today to mean mailbox money.
Mailbox money is the idea of getting money in your mailbox with little or no work. In the "old days", this meant getting checks in the mail - but today, it basically means passive income that hits your account without much effort.
Passive income is earnings from a rental property, limited partnership, or other business in which a person is not actively involved.
For example if you have a website and earn money through affiliate ads or sell services through your website or you make money through other advertisements as well then that would be passive income.
I earn passive income through my blog through Adsense and affiliate adverts as well and the money comes in whether I work or not.
But to get the money required 5 years of long hard work but now I don't have to work much for it.