onboarding email expiring

Hi all! I need some help.

As we are coming upon the end of our first year open in Gainsight, our onboarding emails are expiring. I have them set to drip 1 day after registration, 7 days after registration, 14 days after registration and so on for their first 30 days.

After archiving and duplicating the emails, I need to set the triggers so that each email is only sent to new registrants and not everyone who registered more than 7 days ago 😳

I am wondering if this is where our segments would come into play… would love some guidance! Thanks!