What are best practices for attempting a "re-engagement campaign"? How do you see if dormant subscribers are still interested in getting mail?
To re-engage dormant subscribers, some clients will send an automated series of three emails spaced out over 3-6 weeks (see the re-engagement workflow template in the "Automation" tab) and others just send one final email. This email will typically contain a link to unsubscribe in the body of the email and also include a "stay engaged" link to a whitepaper, resource, or thank you screen. You want to include some sort of actionable item in order to measure some sort of engagement.
Once you've run the course of the engagement campaign, you can find the emails that did not engage and change their status to held or expired. If you need assistance changing contact status to held or expired, please contact Support or visit our article about bulk updating contact status using CSV import.