mail app easter egg/genie

[im_electronic]

click and drag a piece of mail from the main window, with the mailbox open, from the right side to the right side of the screen to the left side, take notice to what follows it.

 

[Bogie]

That isn't an easter egg, its a feature.

 

[Jasoco]

I found this by accident too a few months back.

Up til then, I was trying to figure out how to move the side part, but found out by accident.