Hey @Maxwell
Thanks for posting another great question!
When you create a sunset flow it will allow you to identify profiles who are unengaged with your marketing. However it will not automatically suppress the profile. You will need to create a new segment that leverages the tag you give to unengaged subscribers who go through your sunset flow and have not opened or clicked a message lately:
- Properties about someone > Unengaged is true AND
- What someone has done (or not done) > Opened email zero times in the last 90 days AND
- What someone has done (or not done) > Clicked email zero times in the last 90 days

You will need to monitor and periodically suppress this segment. Do so whenever you perform your regular list cleaning — at least two to three times a year is recommended. To do this:
- Click the Manage Segment dropdown.
- Select Export Segment to CSV.

- Navigate to the Profiles tab.
- In the upper right-hand corner, click Suppressed Profiles.
- Click Upload File to upload this CSV file.

- You can also exclude this segment from all of your campaigns in the interim to ensure that you don't email anyone who is not engaged.
Hope this helps!