Reversing a Move or Delete Operation

  Choose Undo Move/Delete from the Message 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 still listed in the index.  Messages
  are not actually moved or deleted until the folder is closed.
  While the folder remains open, you can reverse the operation
  by pointing to the message and choosing this menu item.

  Additional topics:

  *   Moving a Message

  *   Deleting the Current Message