The Newsletter Subscribers list increases by dozens of entities every day and the email addresses have no correlation with magento registered users or mailchimp users.
There is no information on the data entry flow in the official magento documentation: https://docs.magento.com/user-guide/v2.3/marketing/newsletter-subscribers.html
In the standard version of magento what are the entry points that can be used to join the list?
P.S. In the backend configuration the General options -> Enabled value is set to NO.
Thank you
