How can you isolate risky contacts without deleting them?

Engagement tiers create a graduated sending strategy where your most responsive subscribers get the most email, and your least responsive get the least.

Tier 1: Highly engaged. Clicked in the last 30 days. These subscribers are actively interested. They can receive all campaigns. Their positive engagement signals boost your reputation.

Tier 2: Engaged. Clicked in the last 30-90 days. Still responsive but less active. Include in most campaigns. Watch for decline.

Tier 3: Moderately engaged. Clicked in the last 90-180 days. Fading interest. Send only your best content. Try re-engagement approaches.

Tier 4: Unengaged. No clicks in 180+ days. High risk to your reputation. Exclude from regular campaigns. Consider re-engagement series or suppression.

How this protects reputation:

Mailbox providers judge you by aggregate engagement. When you send mostly to people who engage, your metrics look healthy. When you blast everyone including non-engagers, your metrics suffer and filtering increases.

Implement through send rules. Your default campaign targets Tiers 1-3. Promotional blasts might target only Tier 1-2. Re-engagement campaigns specifically target Tier 4 with appropriate content.