Thanks for the reply! I just landed on my issue after reading your response and digging in more. Seems I can do a search for every user in my Sendgrid contact list and filter by whether or not they have a specific list in their “List of Ids.” However, the Sendgrid Contacts plugin is using pages to search through the contacts, so in it’s basic form, it’s not searching through all of my contacts, and thus not finding someone in the first page it’s searching.

So… it’s only searching through the first 100 individuals in my Sendgrid Contacts list, but I need to build a system where it searches through everyone in my Sendgrid Contacts list and finds any user that has a specified List ID in their List of Ids. I believe I need to learn how to run a workflow to somehow go through multiple pages of a list and save the right emails to a list to email.

Or I’m super far off! Who knows…