Hello shesallkat
Welcome to the SBB Community.
So,
You can use the ticket out of your e-mail, too, there is no issue about it.
If you need more assistance, we are not the right people for it. Please contact SBB as we fo not have access to the ticketing system:
+41 51 225 78 56 (24/7)
Or, through their chat:
https://sbb-tickets.cc/en/help-and-contact/chatbot.html#anchor4
Kind regards,
Roland