I cannot for the life of me figure out how to set up an automatic responder that sends a thank you email after someone signs up for our newsletter. 

"

1. Log in to your Odoo account and navigate to the Email Marketing app.
2. Click on the Campaigns tab and select the campaign that you want to add the thank you email to."

There is no Campaigns Tab. And all the other answers I have found are similar in that it requires features that don't show up.

I'm running Odoo Saas. 

Thanks in advance!