Memberships Pro & Mailchimp integration

Hi

Just set up Mailchimp integration with M2 and have a couple of questions.

1. Opt in. Where should we set the user opt in permission (ideally we want a double opt in process too). Memberships registration form does not have any opt in text / button? Do you know if we can we configure Mailchimp to send a confirmation / opt in email after a user registers? As it is an important area, can you describe what other user M2 users do to achieve best practice here and not get spammed etc?

2. As recommended, we have set up 3 x lists – Registered, Members & Expired. So I assume that M2 automatically updates the lists by moving users between the different lists according to their membership status – it would be useful if you could just confirm this please?

Regards,

Paul