You can sort the cards in your mailbox so they are shown at the order you choose. The cards can be sorted according to the following parameters: Newest (default) - The card with which you last communicated will appear first. Unread messages - The cards with messages you haven't read yet will appear first, and the newest message will appear first.
In order to sort the cards in your mailbox, click on the desired option next to the "Sort by" button.