Mailbox is a function released to My Singing Monsters since Version 2.1.0. Replaced News.
Unlike the original News, the Mailbox has a Furcorn read the mail to you, like the tutorial. There are no pictures to go along with the Furcorn. Unfortunately, this also means that the news message displays cannot be shown other than as randomly generated messages after loading the game.
The Mailbox also can give gifts to the player.
Screenshot of the first set of news of Mailbox
Rarethereal Reprise offer
One of 30 daily rewards for playing in My Singing Monsters during Anniversary Month 2017