If you are going on holiday and want your ally to play for you, you need to do the following before you leave:
Notify the host that your ally (player alias) will play for you and for which period (firstname.lastname@example.org)
Set ally in Autotroll so that your ally will also receive your RST file (Other Game Options menu on your game page)
Your Ally need to maketurn both turns at the same time to send to the host or else Tim Continuum will attack.
Alternative to set ally in Autotroll you can also add a shadow\secondary email if the holiday player is not in your game so that they will receive and be able to send turns.