Attentive
Go to Admin → Plugins → Email Service Providers, click Attentive, and select the green Activate button.
Enter access_token. This is the API key on your private app at Attentive. It is required to create a custom app to use this plugin. https://ui.attentivemobile.com/integrations/custom-app/management
Enter signUpSourceId. This is the ID of your Sign-up Unit at Attentive.
Enter an optional FriendlyName
Press Connect
Edit the plugin. Enter Campaign Routing using standard functionality.
Where to find your API key in Attentive?
https://ui.attentivemobile.com/integrations/custom-app/management