We received an attendee email list from a sponsored event (approximately 800 contacts). We'd like to send a follow-up email through Klaviyo, but we want to avoid negatively impacting our sender reputation or deliverability.
What is the recommended best practice for importing and emailing these contacts? Should they be added to a separate list and warmed up with a dedicated campaign first?
If the recommendation is to keep them on a separate list initially, what is the best way to migrate engaged contacts to our primary marketing list over time while maintaining good list hygiene and sender reputation?