A massive subscriber count means nothing if half of them aren't opening your emails. In fact, keeping dormant subscribers on your list actively harms you.
Inbox providers (Gmail, Apple, Outlook) track your total engagement rate. If they see you consistently sending emails to thousands of people who never open them, they will assume your content is junk and begin routing your broadcasts to the Promotions or Spam folders for everyone—even your most engaged readers.
To protect your deliverability deliverability and scale efficiently, you must prune the dead weight via an automated Re-Engagement Campaign.
1. Defining the 'Dormant' Subscriber
The first step is setting the trigger logic for your automation.
Generally, a subscriber is considered "dormant" or "cold" if they have been on your list for at least 30 days and have not opened an email or clicked a link in the last 90 days.
Note: With Apple's Mail Privacy Protection (MPP) artificially inflating open rates, clicks are a far more reliable metric of engagement than opens.
2. The 3-Part Revival Sequence
Once a subscriber triggers the 90-day inactivity condition, your InkBrief automation pauses them from receiving regular broadcasts and drops them into a dedicated 3-part sequence.
Email 1: The High-Value "Bribe" (Day 1)
Subject Line Concept: "Did you miss this?" or "A quick gift for you"
The goal is just to secure a click. Send them your absolute best lead magnet, a free template, or an exclusive discount code that they haven't seen before.
- If they click the link, your automation instantly removes the 'dormant' tag and places them back on your active broadcast list.
- If they ignore it, they wait 3 days for the next email.
Email 2: The Direct Check-In (Day 4)
Subject Line Concept: "Are you still interested in [Topic]?" or "Checking in"
This email is highly conversational and plain-text. It should look like an email from a friend.
"Hey [Name], I noticed you haven't opened my last few emails about B2B growth marketing. I totally get it—inboxes get crowded. Do you still want to receive these tactics every week? If so, just click this link to confirm, and I'll keep you on the list. If not, no action is needed, and I'll respectfully remove you this weekend."
Email 3: The 'Goodbye' (Day 7)
Subject Line Concept: "Action Required: Unsubscribing you shortly" or "Goodbye!"
This is the ultimatum. It triggers FOMO (Fear Of Missing Out).
State clearly that this is the final email they will ever receive from you unless they click a confirmation link within the next 24 hours. The psychology of loss-aversion often causes a surprising spike in clicks on this specific email.
3. The Purge (Day 8)
If the subscriber has ignored all three emails, the automation must execute the final action: Unsubscribe them.
Do not keep them on a secondary list. Do not "pause" them. Hard unsubscribe them.
You are not losing a subscriber; you are excising a tumor that is dragging down your deliverability metrics. Every time this automation completes, your overall engagement rate increases, which tells Gmail that you are a highly-valued sender, improving inbox placement for the rest of your audience.
Summary
List hygiene is an unavoidable reality of scale. By setting up an automated Re-Engagement Campaign in InkBrief, you eliminate the emotional difficulty of deleting subscribers and ensure your infrastructure is continuously optimized for maximum inbox placement.