Using the Mailerlite filters is a great way to find people who aren’t necessarily in a group, you can find people who aren’t in a group, people who haven’t opened emails in a certain amount of time, or people who did not receive a certain campaign.

In this example we created a group of subscribers who had opened an email, and so now we want to find all of those subscribers who are not in that group. If you need instructions for creating a group you can find those here, if you need help finding subscribers who have opened an email and putting them into a group then you can find that here.

For now though we are using filters to find people who are not in the group “Subscribers - opened email 2020.12.02”

You might want to use filters for all sorts of reasons. In this case I had created three groups, A, B & C for those who had not opened their emails. As I had selected only the subscribers who were not in that group, I now had 150 subscribers to distribute between the three groups.