Will automessages be sent to new members?

I created a sequence of autoresponders The action says "create new user". My members register with Membership plugin, (not WP). Does this mean that they will automatically receive the autoresponders, or do I have to include them manually? I don't want any WP subscriptions. I've taken the box out, though there are other ways). If people find the WP box and register, they would receive the messages destined for paying members, with links to content. That's why I want to make sure how this works.