right. Based on our metrics, most of the emails we send don't get marked as spam. But we do send a lot of emails across our users. Maybe over time email services don't like this? Im not too sure.
We can switch to using a dedicated IP address for emails, but then we would have to start charging our users for that. We might do this at some point in the future.
In the meantime, i recommend to add your own smtp details to the backend sdk and send emails yourself. You can find our email templates here:
https://github.com/supertokens/email-sms-templates