New emails come to our system from various sources:
- email collectors or intelligent site collector;
- manual input of emails from users;
- import users within dashboard;
- through the API
By default, new emails do not get any extra information or subscription status, if you do not pass those attributes along with the emails.
Default values for user attributes can be set under Users > Optin
If you want to automatically subscribe new email recipients to a list, you can only do it for Newsletter (main) list, by setting isSubscribed to true. Note that you are the only responsible to acquire subscription confirmation for those that you are sending emails to.