How to collect a database of e-mail subscribers to the newsletter?

Question

Email

There is a site from where through the addon "contact form 7" applications are received by mail.
How can I automatically collect e-mails from the text of the letter to enter them into the mailing list?

Answer 1

Here is an example of an addon that will collect emails for you in Mailchimp.
But keep in mind that you need to ask the user about the desire to subscribe. If you were sent a message using the feedback form, this does not mean at all that he can now send mailings.