Hi Adam
The Newsletter plugins doesn’t have this feature, I wish it could.
But I explored Woocommerce Follow-Ups Plugin (if you use woocommerce). It is excellent and just for that purpose. I am using it and I definately recommend it. I use it for custom discount coupons for each purchase, abandoned charts, review reminders. And there are lot’s of usage areas too.
https://woocommerce.com/products/follow-up-emails/
Best,
Beyhan