Mandrill is a scalable delivery API for transactional emails from websites and applications.
For your Mandrill account, YAP supports the following actions:
Send email via template
Before setup, check that you have granted to YAP the permission to send notification to your Mandrill account. For this, sign in to Mandrill and authorize the permissions requested by YAP.
Please use Mandrill documentation.
Enter an API Key found in your Mandrill settings.