If you are already using Zoho applications such as Zoho CRM, Zoho Books, or Zoho Desk, you do not need to manually configure or connect Zoho CPaaS. These applications come with built-in email sending capabilities, and Zoho CPaaS is automatically used for transactional emails wherever applicable.
If you have specific requirements or questions about email sending from a particular Zoho application, feel free to write to support@zohocpaas.com.