Regarding the second point, this is the API to send an email verification email: https://github.com/supertokens/supertokens-fastapi/blob/fastapi-2.x/supertokens_fastapi/emailverification/api/generate_email_verify_token.py Perhaps you could add some print statements there to see if it's called, and if it is, where it fails. The default implementation for

await recipe.config.create_and_send_custom_email(user, email_verify_link)

is here: https://github.com/supertokens/supertokens-fastapi/blob/fastapi-2.x/supertokens_fastapi/emailverification/utils.py#L31