If your email list were a party, dormant subscribers would be the ones who RSVP'd six months ago and never showed up.
It happens. But dormant subscribers are not dead subscribers. They are untapped opportunities.
Why you should re-engage dormant subscribers
Before we get to tactics, let's talk about why this is worth your time.
1. They cost less than new leads
Warming up a dormant subscriber is often easier and cheaper than acquiring a new one. They already raised their hand at some point.
2. They improve your metrics
If they open again, your engagement rates go up. Better engagement means better inbox placement. It is a virtuous cycle.
3. It protects your sender reputation
Inactive subscribers can hurt deliverability by signalling to inbox providers that your content is not worth engaging with. Re-engaging or removing them improves list health.
4. You might surprise yourself
People change jobs, interests, and priorities. Sometimes a nudge is all it takes to bring them back.
Who counts as "dormant"?
TouchBasePro builds engagement segments for you based on subscriber activity. Here are the four tiers:
- Unengaged: Subscriber last opened or clicked between 90 and 180 days ago
- Dormant: Subscriber last opened or clicked between 180 days and 12 months ago
- Zombies: Subscriber last opened or clicked more than 12 months ago
- Ghosts: Subscriber never opened or clicked any email, 12 months or more since the first email was sent
Re-engagement strategies that work
Re-engagement is not a single email. It is a mini campaign.
1. The gentle reminder
Goal: Get them to notice you again. Tone: Friendly, curious, low pressure.
Example:
"Hey [first name], we haven't heard from you in a while. Still want to hear from us?"
Not a hard sell. Just a soft hello.
2. The value refresh
Goal: Remind them why they subscribed. Tone: Helpful, straightforward.
Examples:
- "Here's what you've missed (and why it was worth reading)"
- "Top 5 emails you might like, curated for you"
Put value front and centre.
3. The incentive nudge
Goal: Give them a reason to re-engage now. Tone: Playful, enticing.
Examples:
- "Open this for a surprise."
- "We've saved something just for you."
This could be a discount, a guide, or a free resource. Just make it relevant.
4. The preference update
Goal: Reset expectations and interests. Tone: Respectful, subscriber-first.
Ask:
- "What do you actually want to hear about?"
- "Pick the topics that matter to you."
These surveys improve future engagement.
5. The goodbye email
Goal: Clean the list once nothing else has worked. Tone: Kind, final, no pressure.
Example:
"We haven't seen you in a while. If you still want great emails, click here. If not, we'll say goodbye, no hard feelings!"
This can actually lift engagement. People appreciate being given the choice.
Timing and cadence tips
Do not send one message and call it done.
Suggested flow:
- Day 0: Gentle reminder
- Day 3-5: Value refresh
- Day 7-10: Incentive nudge or preference update
- Day 14: Goodbye email
Adjust based on your brand, audience, and usual send frequency.
How to measure success
Opens alone are not the most reliable metric these days. Track these instead:
- Re-engagement rate (opens from the dormant segment)
- Click-through rate
- Conversion rate from this segment
- Subscriber churn, before vs. after
- Inbox placement improvements
If a re-engagement campaign spikes engagement and improves send health, it is paying for itself.
Know when to let go
Not everyone will come back, and that is fine.
If a subscriber has not engaged after your full re-engagement series, a preference update attempt, and a final nudge, it is time to prune. Removing them improves deliverability, lifts engagement rates, and protects your sender reputation.
Re-engagement is not only about reviving old subscribers. It is about respecting your audience, keeping your list clean, and getting the most out of every send. Treat dormant subscribers as opportunities rather than dead weight.
Frequently asked questions
- How long before a subscriber is considered dormant?
- TouchBasePro uses four tiers. Subscribers who last opened or clicked between 90 and 180 days ago are flagged as Unengaged. Between 180 days and 12 months is Dormant. Over 12 months is Zombies. Subscribers who have never opened or clicked, and received their first email at least 12 months ago, are classed as Ghosts.
- How many emails should a re-engagement campaign include?
- A practical sequence runs four emails over about two weeks: a gentle reminder on day 0, a value refresh on days 3 to 5, an incentive or preference update on days 7 to 10, and a final goodbye email on day 14. Adjust the spacing to suit your normal send frequency.
- Does removing inactive subscribers actually help deliverability?
- Yes. Inbox providers track how recipients interact with your emails. A large proportion of inactive contacts signals that your content is not worth showing in the inbox. Pruning subscribers who never respond improves your engagement rates and sender reputation over time.
- What metrics should I track for a re-engagement campaign?
- Focus on re-engagement rate (opens from the dormant segment), click-through rate, conversions from that segment, subscriber churn before and after the campaign, and any changes in inbox placement. Opens alone are not reliable enough to judge success.