Transactional emails are automated messages triggered by user actions, delivering critical and personalized information. These include password resets, account confirmations, and payment receipts—ensuring timely and relevant communication. Unlike promotional emails, transactional emails focus on essential updates directly related to the user experience.

For OTP verification, transactional emails provide a secure and efficient way to authenticate users by delivering one-time passcodes instantly. These messages can be formatted in full HTML, text, or template designs without restrictions, ensuring flexibility and reliability.