What is the ideal re-engagement trigger?

The ideal trigger fires early enough to matter but late enough to confirm a pattern.

Too early means false alarms. Everyone has busy weeks. Someone who skipped two emails isn't necessarily disengaging. Triggering too soon wastes effort on normal variation.

Too late means lost opportunity. By the time someone hasn't engaged in six months, they've likely forgotten you. The window for effective re-engagement has closed.

The sweet spot depends on your frequency:

Daily senders: 30-45 days without engagement

Weekly senders: 60-90 days without engagement

Monthly senders: 90-120 days without engagement

These aren't hard rules. Adjust based on your data. Look at historical patterns: when do lapsed subscribers typically re-engage versus go permanently silent? Set your trigger before the point of no return.

Also consider engagement trend triggers. Instead of absolute inactivity, trigger when someone's engagement rate drops significantly from their personal baseline. This catches decline before complete silence.

Test and refine. Track re-engagement campaign performance at different trigger points. The ideal trigger is the one that maximizes reactivation rates for your specific audience.