Currently there is no easy method yet to save an individual game from a history or liblist. Menu on the left under Games > My Games. In the middle of your interface you get a list of games played from your history. Right click on a game only gives option to save the game to your ONLINE library. Interface will have a 'mailstored' feature in future versions.
You can email games from histories, libraries, database (search list), and adjourned games by Command Line Method.
For this and more information read "help mailstored".To mail the last game you played go to the console button on the bottom of your screen (or menu above: View> Console). Type on the command line: mailstored -1
To automatically email all the games you play right after you play them, go to the toolbar above: Settings > Advanced > Click on the button for Advanced Server Settings > Scroll to automail and check it. Here you can also choose the mailformat.