Whats the best way to capture users for a mailing list in Brevo? Using WebHooks?

[purplehead]

My settings all work for transactional emails, but I don't know how to get the users into a list using automations. I tried "email opened" and the first double opt in email, which i can see in the email transactions, work for people, they get that and then go past to confirm. So how do i capture the transactional email in a list? When someone has ticked in chevereto that they want to recieve marketing emails? how do i get brevo to access that info? anyone have an example of their work flow for brevo? thanks.

 

[Barry]

I do a manual export of email addresses from the DB, and insert to ESP as a CSV file