How to Reactivate Dormant Email Subscribers

A subscriber who once opted in but has stopped engaging represents both a lost revenue opportunity and, eventually, a deliverability risk — mailbox providers track engagement, and a large inactive segment can drag down overall sender reputation even for your engaged subscribers.

Define dormancy based on your own typical engagement cycle (a subscriber who hasn't opened in 90 days means something different for a daily sender than a monthly one) rather than an arbitrary universal threshold.

A win-back sequence typically starts with a genuine "we miss you" message, sometimes with an incentive, followed by a final "is this still the right email" message before removal — this final step matters as much for list hygiene as for recovery.

Subscribers who don't respond even to a well-crafted win-back sequence should generally be removed from your active list — continuing to mail unengaged contacts indefinitely hurts deliverability for your entire list more than the marginal chance of eventual re-engagement is worth.