Best Practices February 4, 2026 9 min read

How Do I Identify Inactive Subscribers?

Identify inactive subscribers by tracking email opens, clicks, and website activity over 3-12 months. Subscribers with no engagement in 6+ months are typically considered inactive. Segment by "last engagement date" and consider re-engagement campaigns before removal. Note that open tracking is less reliable due to Apple Mail Privacy Protection.

Inactive subscribers hurt your deliverability by lowering engagement metrics and potentially becoming spam traps. Identifying them is the first step to improving list health.

Engagement Signals to Track

Email Engagement

Non-Email Engagement

Apple Mail Privacy Protection Impact

Apple MPP causes many emails to show as "opened" even when they were not read. Rely more on clicks and non-email engagement signals. An "open" alone may not indicate genuine activity.

Inactivity Timeframes

TimeframeStatusRecommended Action
No engagement: 30-90 daysDeclining interestMonitor, try different content
No engagement: 3-6 monthsAt riskBegin re-engagement efforts
No engagement: 6-12 monthsLikely inactiveRe-engagement campaign, then remove
No engagement: 12+ monthsInactiveRemove from regular sending

Creating Engagement Segments

Highly Engaged

Clicked or purchased in last 30 days. These subscribers should receive all your communications.

Engaged

Opened in last 30 days or clicked in last 90 days. Core audience for regular campaigns.

Moderately Engaged

Opened in last 3-6 months. Include in campaigns but monitor.

Disengaged

No opens or clicks in 6+ months. Target for re-engagement, exclude from regular sends.

Inactive

No engagement in 12+ months. Remove or move to sunset list.

Practical Identification Steps

  1. Export engagement data: Pull open and click dates for all subscribers
  2. Calculate last engagement: Find most recent activity per subscriber
  3. Add non-email data: Include website/purchase activity if available
  4. Segment by timeframe: Group subscribers by last engagement date
  5. Review segment sizes: Understand how much of your list is inactive

Re-Engagement Before Removal

Before removing inactive subscribers, try to win them back:

Re-Engagement Campaign Elements

Re-Engagement Timeline

  1. Email 1: Friendly "we miss you" message
  2. Email 2 (7 days later): Value reminder with incentive
  3. Email 3 (14 days later): Final chance, warning of removal

If no response after the campaign, remove from your list.

Handling Removed Subscribers

Frequently Asked Questions

How much of my list should I expect to be inactive?
Lists typically have 20-40% inactive subscribers after one year without cleaning. Higher for older lists or infrequent senders. If more than 50% of your list is inactive, you may have list acquisition or relevance problems to address.
Should I remove subscribers who open but never click?
Opens without clicks indicate some interest but low engagement. These subscribers are borderline. You might reduce sending frequency to them rather than removing entirely. Consider testing different content types to encourage clicks.
What if an inactive subscriber has purchased recently?
A recent purchase trumps email inactivity. They are engaged with your brand even if not with email. Keep them on your list. Their email inactivity might indicate they check purchases via your app or website instead.

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