I need to import users from my database and now I need to send welcome email to all users in bulk, so how can I send the email to all users in one go?
There is no bulk welcome email feature.
You can send verification emails from this endpoint:
You could temporarily customize this as a welcome email using email templates, as well as prompting users to verify their email:
Additionally, you could handle this logic directly with your email provider and bypass Auth0 entirely.