Reversing the Move or Delete of the Current Message

  Choose Undo Move/Delete from the Read pop-up menu to
  reverse a move or delete operation.

  When you move or delete a message, the message is marked
  for moving or deletion but is not actually moved or deleted
  until the folder is closed.  While the folder remains open, you
  can reverse the operation by choosing this menu item.

  Additional topics:

  *   Deleting the Currently Displayed Message

  *   Moving the Currently Displayed Message