If you wish, you can maintain the archive of incoming and outgoing messages; just tick the corresponding options in the menu settings (Fig. 1).
Fig. 1: The Incoming and Outgoing Message Archive window.
You can resend messages from the archive by clicking the menu Message | Resend or double-clicking on the message on the list.
All messages are recorded to the file Messages.log in the user's documents folder\10-Strike\LANState (Pro/Personal)\Logs.