To use any of the above modules, you need to connect your Mandrill account to Integromat. If you do not have a Mandrill account yet, you can create one at Mandrillapp.com.
To connect your Mandrill account to Integromat, follow the general instructions for Connecting to services. After you click the Continue button, you will be prompted to enter your Mandrill API key. To find the API key, log into your Mandrill account and go to Settings > SMTP & API Credentials.
Once you have entered the required data, the connection between Integromat and Mandrill is established. Now, you can continue creating your scenario.