Sunset Policy Automation
Subscriber Sunsetting & Inactive Pruning Calculator
Model deliverability lift, open rate resurgence, and ESP bill reduction from sunsetting dormant subscribers.
Subscribers Sunscaled / Pruned
150,000
Removed from active daily mail
Projected Open Rate Lift
+33.3% Lift
From 18% to 24.0% effective opens
Annual Wasted Send Savings
$6,120 / yr
At 4 sends/month on cloud ESP
Spam Trap Exposure Reduction
-88% Risk
Dormant recycled traps avoided
Sunset Policy Recommendation
Pruning 150,000 dormant subscribers immediately signals to Gmail and Yahoo that your active list has high engagement velocity, raising your domain reputation score from Neutral to High.
Automate Custom Sunset Policies in AutoSMTP
Set automated engagement triggers to archive non-responders into cold recovery storage.
Why Pruning Unengaged Subscribers Increases Net Inboxing
Many email marketers resist removing subscribers for fear of reducing audience size. However, mailbox providers like Gmail measure domain engagement percentages: (Total Opens / Total Delivered). Continuing to mail dead accounts drags down your entire domain reputation.
The Ratio Principle
Sending to 100,000 subscribers with 30,000 opens (30% open rate) guarantees higher inbox placement than sending to 300,000 subscribers with the exact same 30,000 opens (10% open rate).
Recycled Trap Prevention
ISPs regularly convert dormant inboxes into recycled spam traps after 180 days of inactivity. Sunsetting accounts at 90 days completely neutralizes this catastrophic risk.
Automated Re-Permission Sequences
Before pruning, trigger a 3-part re-permission sequence: “Are you still interested?”. If no click is recorded, automatically suppress the record.