I ran a campaign to leads that were imported from a CSV. I want to run a follow up campaign and want to know if I have to go through the CSV I imported to manually delete leads or if they will delete on their own.
Not sure I understand the question. Unsubscribing itself doesn't delete leads from your database, let alone from the CSV. Unsubscribed addresses will not receive your follow-up campaign, however, provided you do not falsely mark it as Operational.
Retrieving data ...