Our company has a newsletters plugin developed for Shopify platform. Our customers would like to send welcome letters to newsletter subscribers through our app. In Shopify, there is only sync happening between Shopify and our app, which means that newsletters cannot be triggered (no opt-in happening). We would like to create the logic that when subscriber subscribers they will receive our welcome letter.
Is it somehow possible to follow Shopify's opt-in statuses (marketing accept?) and trigger the welcome email on that?
Hope you can help us with this question